It’s a car or a boat to fill up with plastic balls (not included), action figures, stuffed animals - anything at all. The bottom is designed with a smooth curve to provide best safety. The ripple lines inside the Bowl not only make the Bowl beautiful but serve as anti-slip function. Proper size for one or two children to sit in together. The wavy edge provides children with air circulation when it is turned upside down. Good for stretching exercise when it is turned upside down. Ages 6 months and up.