Students can take mechanical researching skills to the next level with the Lights & Action Building Set. The next step after the Basic Building Sets (LER 9162 & 9164), this set is fully compatible with all other Gears! Gears! Gears! ? sets. Pieces snap together easily and pull apart to let students build anything they can imagine - ;there's no wrong way! Features 121 durable, plastic gears and includes a power motor, flashing lights, glow-in-the-dark stickers and more - all in a handy storage tub. Button-cell batteries for flashing lights are included. Motor requires 3 AA batteries, not included.