diff --git a/golem_activity_session/__init__.py b/golem_activity_session/__init__.py
new file mode 100644
index 0000000..2fca3d2
--- /dev/null
+++ b/golem_activity_session/__init__.py
@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+#    Copyright 2016 Fabien Bourgeois <fabien@yaltik.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from . import models
diff --git a/golem_activity_session/__openerp__.py b/golem_activity_session/__openerp__.py
new file mode 100644
index 0000000..cf04583
--- /dev/null
+++ b/golem_activity_session/__openerp__.py
@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+
+#    Copyright 2016 Fabien Bourgeois <fabien@yaltik.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+{
+    'name': 'GOLEM Activity Sessions',
+    'summary': 'GOLEM Activities Session management',
+    'description': ''' Non-profit french MJC activies session management ''',
+    'version': '0.1',
+    'category': 'Non-profit management',
+    'author': 'Fabien Bourgeois',
+    'license': 'AGPL-3',
+    'application': False,
+    'installable': True,
+    'depends': ['golem_activity'],
+    'data': ['views/golem_activity_view.xml']
+}
diff --git a/golem_activity_session/models/__init__.py b/golem_activity_session/models/__init__.py
new file mode 100644
index 0000000..1bba04c
--- /dev/null
+++ b/golem_activity_session/models/__init__.py
@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+#    Copyright 2016 Fabien Bourgeois <fabien@yaltik.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from . import golem_activity_session
diff --git a/golem_activity_session/models/golem_activity_session.py b/golem_activity_session/models/golem_activity_session.py
new file mode 100644
index 0000000..46c71fa
--- /dev/null
+++ b/golem_activity_session/models/golem_activity_session.py
@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+
+#    copyright 2016 fabien bourgeois <fabien@yaltik.com>
+#
+#    this program is free software: you can redistribute it and/or modify
+#    it under the terms of the gnu affero general public license as
+#    published by the free software foundation, either version 3 of the
+#    license, or (at your option) any later version.
+#
+#    this program is distributed in the hope that it will be useful,
+#    but without any warranty; without even the implied warranty of
+#    merchantability or fitness for a particular purpose.  see the
+#    gnu affero general public license for more details.
+#
+#    you should have received a copy of the gnu affero general public license
+#    along with this program.  if not, see <http://www.gnu.org/licenses/>.
+
+from openerp import models, fields, api, _
+
+
+class GolemActivity(models.Model):
+    _inherit = 'golem.activity'
+
+    session_count = fields.Integer('Sessions',
+                                   compute='_compute_session_count')
+
+    @api.one
+    def _compute_session_count(self):
+        dmn = [('activity_id', '=', self.id)]
+        cnt = self.env['golem.activity.session'].search_count(dmn)
+        self.session_count = cnt
+
+    @api.multi
+    def button_session(self):
+        self.ensure_one()
+        return {'name': _('Activity Sessions'),
+                'type': 'ir.actions.act_window',
+                'res_model': 'golem.activity.session',
+                'view_mode': 'tree,form',
+                'context': {'default_activity_id': self.id,
+                            'default_animator_id': self.animator_id.id},
+                'domain': [('activity_id', '=', self.id)]}
+
+
+class GolemActivitySession(models.Model):
+    _name = 'golem.activity.session'
+    _description = 'GOLEM Activities Sessions'
+
+    name = fields.Char('Name', compute='_compute_name')
+
+    @api.depends('activity_id', 'weekday')
+    def _compute_name(self):
+        for s in self:
+            s.name = s.activity_id.activity_name
+
+    # TODO: reucrrence etc... to link with calendar.event
+    activity_id = fields.Many2one('golem.activity', string='Activité',
+                                  required=True)
+    animator_id = fields.Many2one('res.partner', string='Animator',
+                                  required=True)
+    is_recurrent = fields.Boolean('Is recurrent ?', default=False,
+                                  help="Work in progress")
+    weekday = fields.Selection([('mon', _('Monday')),
+                                ('tue', _('Tuesday')),
+                                ('wed', _('Wednesday')),
+                                ('thu', _('Thursday')),
+                                ('fri', _('Friday')),
+                                ('sat', _('Saturday')),
+                                ('sun', _('Sunday'))])
+    hour_start = fields.Float('Start time')
+    hour_end = fields.Float('End time')
+    note = fields.Text('Note')
+
+    @api.constrains('hour_start', 'hour_end')
+    def _check_period(self):
+        """ Check if end hour if after start hour """
+        for s in self:
+            if s.hour_start > s.hour_end:
+                raise models.ValidationError(_('Start of the period cannot be '
+                                               'after end of the period.'))
diff --git a/golem_activity_session/views/golem_activity_view.xml b/golem_activity_session/views/golem_activity_view.xml
new file mode 100644
index 0000000..fa35a06
--- /dev/null
+++ b/golem_activity_session/views/golem_activity_view.xml
@@ -0,0 +1,105 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2016 Fabien Bourgeois <fabien@yaltik.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+-->
+<openerp>
+  <data>
+
+    <!-- Form -->
+    <record model="ir.ui.view" id="session_smart">
+      <field name="name">Add sessions management into smart button</field>
+      <field name="model">golem.activity</field>
+      <field name="inherit_id" ref="golem_activity.view_form" />
+      <field name="arch" type="xml">
+        <div name="buttons" position="inside">
+          <button class="oe_inline oe_stat_button" type="object"
+            name="button_session" icon="fa-list">
+            <field string="Week sessions" name="session_count" widget="statinfo" />
+          </button>
+        </div>
+      </field>
+    </record>
+
+    <record id="view_form" model="ir.ui.view">
+      <field name="name">GOLEM Activity Sessions Form</field>
+      <field name="model">golem.activity.session</field>
+      <field name="arch" type="xml">
+        <form>
+          <sheet>
+            <group string="Activity Session">
+              <group>
+                <field name="activity_id" />
+                <field name="animator_id" />
+              </group>
+              <group>
+                <field name="is_recurrent" readonly="True" />
+                <field name="weekday" />
+                <field name="hour_start" widget="float_time" />
+                <field name="hour_end" widget="float_time" />
+              </group>
+            </group>
+            <group>
+              <field name="note" />
+            </group>
+          </sheet>
+        </form>
+      </field>
+    </record>
+
+    <!-- Tree -->
+    <record id="family_tree" model="ir.ui.view">
+      <field name="name">Session list</field>
+      <field name="model">golem.activity.session</field>
+      <field name="arch" type="xml">
+        <tree>
+          <field name="activity_id" />
+          <field name="animator_id" />
+          <field name="weekday" />
+          <field name="hour_start" />
+          <field name="hour_end" />
+        </tree>
+      </field>
+    </record>
+
+    <!-- Searches -->
+    <record id="searches" model="ir.ui.view">
+      <field name="name">GOLEM Activity Sessions Searches</field>
+      <field name="model">golem.activity.session</field>
+      <field name="arch" type="xml">
+        <search>
+          <field name="activity_id" widget="many2one" />
+          <field name="animator_id" widget="many2one" />
+          <group string="Group By">
+            <filter name="group_weekday" string="By weekday"
+              context="{'group_by': 'weekday'}" />
+            <filter name="group_animator" string="By animator"
+              context="{'group_by': 'animator_id'}" />
+          </group>
+        </search>
+      </field>
+    </record>
+
+    <!-- Actions -->
+    <act_window id="session_action_list" name="GOLEM Activities Sessions List"
+      res_model="golem.activity.session" view_mode="tree,form" />
+    <!-- Menus -->
+    <menuitem id="session_menu_list" name="Activities sessions"
+      parent="golem_activity.activity_menu" action="session_action_list"
+      sequence="10" />
+
+
+  </data>
+</openerp>