Playful experimentation with magnetism. There are a lot of things around us that are magnetic, and you don't look at things. You can't smell or hear the magnetic forces and you certainly can't see them. But you can sense these mysterious forces with your magnets. Try to learn more about these forces, it's easy! for children from 4 to 8 years old under the guidance of adults. Contains iron shavings, balls, nails and magnets. Please read the warnings and instructions for children from 4 to 8 years of age under adult supervision.