Don't waste your money on these, they are super thin - about the thickness of a balloon and most of them come dented, and it's about impossible to un-dent them. They are cheap and flimsy and my 14 month old gentle girl smashes them in just by picking them up. Not even close to the ball pit quality you would expect. I should have gone to toys r us. They aren't red, orange, yellow and purple as pictured - they are an ugly pink, blue, yellow and green.DISAPPOINTED.