Mudpuppy wooden magnetic sets of numbers, letters or shapes, are colorful, decorative, reliably magnetic, and educational, too! Each magnetic set contains 40 1-3/4'' (4.5 cm) tall wooden pieces with full magnetic backing. They come in a cute re-sealable milk carton package that measures 8-1/2 x 3-1/2 x 2-3/4'' (9 x 21 x 7 cm) and closes with double snaps. These wooden numbers and letters are environmentally friendly too: the pieces contain 80% recycled wood, and the packaging contains 85% recycled paper. The colorful pieces and packaging are printed with nontoxic inks. Because of small parts, this product is a choking hazard for children under 3 years of age. Recommended for ages 3+