These unique crayons allow your kids to get creative in the bath. Designed to draw directly on tile and tub surfaces, they can be washed off easily with water. The crayons float and even work on wet surfaces. They feature an ergonomic hexagon shape for easy holding. The crayons are made from paraffin wax and wrapped with waterproof paper. One set comes with 10 colors: white, pink, red, orange, yellow, green, blue, violet, brown, gray. Each set comes with a sponge. Each crayons measures approximately 0.5 x 2.5 in (diameter x length). Recommended for children ages 3 years old and above. Made in Japan.