Plyocare balls

I currently do driveline baseball program and was wondering some ideas for where I can throw my plyocare balls. I live in nyc where there arent too many ball fields and need to mindful of other users at parks. Thanks,
Ethan

I’ve been told you can throw them against a concrete wall. You just might have to put a little air in them over time. There is a little hole in them for a needle. Good luck.