Suggestions for player with significant mobility challenges

I coach a rec program (grade 5/6) and one of the players has a disability that prevents him from running and can't get hit, but he wants to participate in practices and I am all for it. He can throw and catch, but he just can't really run. He's a great kid with a great attitude and I want him to feel like he's part of the team.

Today was our first practice of the season and I had him throw out balls on the 2v1 ground ball drills, he did line drills but just cycled back to the same line, etc. I spoke to his dad after practice and he said he had an amazing time which is what it is all about.

I'd love some suggestions on how to keep him included in practice, without significantly hindering the flow (which is exactly how his dad described the ideal situation). Thanks!