The acorn is designed with a small bell inside, which gives a nice sound when shaken. The leaves in two fine colors are soft and nice to cuddle with and have a nice crackling sound. With velcro closure on the strap that makes it possible to use the activity toy on one of our activity gyms, above the changing table or in the car seat. A fine toy that both stimulates the child's vision and sense of hearing and develops the child's fine motor skills.