One of the things we tried was gymnastics class. There is actually a gymnastics school for kids in the same building as the preschool the kids attended this spring (on a drop in basis once per week) and we were able to catch the last two weeks of the session.
Finn was able to go himself and he did ok. I think it might not be his favorite, but he had fun.
With Lilly I had to attend the class (gets a little complicated as I have nobody to leave Finn with - he came and played the iPad in the corner) and I think she really liked it. So I think we might sign her up for the fall.
As we caught the last classes, they were able to participate in the "graduation" which was fun. They all got a ribbon and a fun final class.