Click to expand Tap to zoom Uncle Goose | Periodic Table Blocks | 20 by Uncle Goose Save Liquid error (product-badge line 32): -Infinity% $79.99 | / 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Probably the only time you should let a child play with Plutonium and Arsenic. Each colorful block features six element images accompanied by their atomic number, symbol, and name.