Start-Up Circuits


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. 

Only 1 left in stock


  • Includes 3 switch blocks, 3 action tops, instructions and parent guide.
  • Requires 6 AA batteries (sold separately).
  • Ages 18 months to 4 years