This set includes 5 rainbow-colored wooden eggs, each of which makes a different noise. Four eggs shake (two rattle, one chirps, and one jingles), and the light blue egg twists to make a clicking sound. These wooden egg shakers are made of solid beech wood from sustainable forests in Germany, and they are treated with multiple layers of water-based stains that penetrate the wood. This is followed by a clear protective coating, which makes these musical egg toys totally safe for toddlers who still explore with their mouths.