I have 2 ds aged 18 months and just turned 4. My eldest is severely speech delayed and has been behind in all areas of development. We tried swimming lessons a while back but he had a meltdown as we couldn't get in the pool with him and we tried kick boxing which he didn't want to do either. I see other parents with kids the same ages who go to different classes and I can't help but feel like my boys are missing out. Should I try something else or wait longer? How important are classes at this age?