Lego mindstorms 3 ev robot batteries
Lego set command robot walks talks remote controll includes ev3 brick with powerful arm9 processor recommended minimum age 10 years recommended maximum age 99 years pieces 594 electronic series mindstorms theme robot features arm9 processor remote control 4 motor ports usb port backlit infrared sensor micro sd card reader motion sensor interactive servo motors additional information batteries required warning not suitable for children under 36 months