When kids click together these chunky pieces and then flip the switch, they'll get an exciting result: either a spinning fan, a glowing light, or a whistling siren! All switch blocks and action tops are interchangeable for mixing, matching and experimenting with actual working circuits in a completely safe way. Young children will develop an innate understanding of circuitry and build a strong foundation for future STEM success. Includes 3 Action Tops, 3 Switch Blocks, Instructions and Parents Guide Requires 6 AA batteries (not included) Recommended for 1 to 3 players, ages 2 and up Made in China Imported Product Specifications Package dimensions: 10 in x 9 in x 4.2 in Material & Care Plastic Wipe clean with dry or damp cloth