When the wheel turns, the wooden balls inside hit the panels creating a fun sound.A fun push toy that encourages kid to be active and develop self-esteem by learning to walk on your own two feet As the wheels turn, the balls within the Walk N Roll bounce hitting the many panels to create a fun jingle Comes with a safety loop to attach to your child's wrist but can also be used when storing the Walk N Roll. Sustainably made in Thailand using chemical-free rubberwood, formaldehyde-free glue, organic pigments and water-based dyes.