Elenco Stem Toy Radio Kit | For Kids 8+ Yrs | Electronics Kit | Science Kit For Kids | Diy Stem Kit | Snap Circuits StemSnap Circuits Uses Electronic Blocks That Snap Onto A Clear Plastic Base Grid To Build Different Circuits. These Blocks Have Different Colors And Numbers On Them So That You Can Easily Identify Them. Build The Circuit Shown By Placing All The Parts With A Black 1 Next To Them On The Clear Plastic Base Grid First. Then, Assemble Parts Marked With A 2, Then Parts Marked With A 3, And Finally, Parts Marked With A 4. Note That There Is A 3 Snap Wire