Probably the only time you should let a child play with Plutonium and Arsenic.
Each of these 20 colorful block features 6 element images accompanied by their atomic number, symbol and name. Note: This set does NOT represent the entire Periodic Table.
- Twenty 1.75-inch (44mm) basswood cubes
- Child-safe inks
- Handmade in the USA
- Ages 2+
