At a loss for ideas for fitness for a 11 YO son with physical delays -- looking for suggestions or a place to start.

My 11 year old son wants to do some kind of fitness program like his older brother (13) who goes to the gym. However, 11 Y0 has some physical issues -- low muscle tone, balance issues, flexibility issues, and does not meet some of the physical fitness standards for kids his age. He does not qualify for physical therapy because he exceeds the physical requirements. We've also done soccer, basketball, and martial arts -- which he didn't care for enough to keep going after the session was done. He also has a mood disorder, SPD, and ADHD which make some activities difficult because of other distractions or noise. Or he can get frustrated and upset if he doesn't do well. Looking for some suggestions on what kinds of programs (if any) that would be a good place for him to start. I know he'd like to be stronger and it would help his self-esteem. via /r/Parenting http://ift.tt/292P1PC