Key Features :
i : Contains 25 parts including 4 colorful LED moudles and 16 flashing & color changing LED modules.ii : Build whatever creative structures come to your imagination...the possibilities are limitless!iii : Directly compatible with other brick building construction setsiv : Requires 3 "AA" battariesv : Ages 5 and upvi : Learn about voltage, current and how circuits with motors, gears and LEDs work.