Review on Franklin Sports MLB Electronic Baseball Pitching Machine: Height ⚾ Adjustable with 7-Second Ball Pitches – Includes 6 Plastic Baseballs by Bob Berry

These are great for contact juggling. They are exactly the same size (70mm) as the balls I am trying to learn. too easy to use like that. I filled some of them with water - a tiny trickle from the tap works better than a stream - and sealed the single hole with tape. The inflated ball now weighs about the same as a contact juggling ball. Now I can do anything without worrying about scratching or breaking a real ball! My daughter and grandson love this idea so I'm glad they came in a set of 8.