A "ball pit" is a large pool or area filled with colorful plastic balls, often found in places like playgrounds or children's play areas where people can jump in and play.
Sentences with «ball pit»
When my twins turn 1, I am going to invest in balls and transform this pack»n play into a giant ball pit for them. (pregnancymagazine.com)
I didn't until I saw a box transformed into ball pit by the same clever 1st birthday party hosts I mention above. (hintmama.com)
But for those who don't have little pools handy, today's hint is seven other spots you can easily transform into DIY ball pits. (hintmama.com)