-Robot Chassis Kit ( http://www.robotshop.com/en/pololu-round-robot-chassis-kit-solid-blue.html) -Arduino(Uno is enough, Mega is ok) -H bridge(http://www.ebay.it/itm/181855403486?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT) - 1 led RGB common catode(http://www.ebay.it/itm/10-LED-RGB-4-PIN-Catodo-Comune-5mm-Ultrabrillante-10-RGB-LED-COMMON-CHATODE-/131167077543?hash=item1e8a2ac4a7:g:y1IAAOxyBjBTTB5n) -Bluetooth module for arduino (HC-05) (http://www.ebay.it/itm/252061666585?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT) -1 switch on/off (http://www.ebay.it/itm/Pulsante-Interruttore-ON-OFF-2-Pin-6A-250V-SWITCH-ROCKER-/172113140757?hash=item2812be1c15:g:zREAAOSwY45UTjo5) -1 power bank (10000 mAh is ok) -1 breadboard -ultrasonic sensor for arduino (http://www.ebay.it/itm/New-Arduino-Ultrasonic-Module-HC-SR04-Distance-Sensor-Measuring-Transducer-LS-/161937960004?hash=item25b4412c44:g:L0gAAOSwYIhWi4Zg) -speaker(http://www.ebay.it/itm/271964572792?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT)