Review: 100 Heavy Duty Plastic Soft Air-Filled Pit Balls for Ball Pits 

100 Heavy Duty Plastic Soft Air-Filled Pit Balls for Ball Pits, Baby Playpen, Pack 'n Play, Bounce Houses, Play Tents, Playhouses, Kiddie Pools, etc. / 5 Bright Colors; Exciting Fun Toy for Toddler, Baby, Kids and Young Adults / Crush Proof, Commercial Grade, Phthalate Free & PVC Free (100 Balls) amzn.to/1T0SUVU
've had the opportunity to get not only the pack of 100 balls - but the 200 ball pack as well. Comes in a real mesh bag that closes for easy cleanup and storage. 200 balls perfectly fills the bottom of the ball pit. 100 is sparse. Combine them for 300 and my kids are in Basing heaven. Durable, have a little squish to them. Softer plastic doesn't hurt when your kid hurls the ball at your head. These are about 2.5 in in diameter and almost identical to the ones my son uses during sensory therapy at the hospital.
I received these balls free from the manufacturer in return for my honest review.