The Embarass River runs by/through the park. If you have your own kayaks, you could put in up river and acces the park from the river. There is a pond/small lake in the park. I don't think swimming is allowed there. In any case, I wouldn't advise it. The lake is used by a local university to conduct studies of the fish in that lake. My grandchildren enjoyed going down to the river, walking along the sand bar, and looking at the many types of shells they found there. To sum up, there is no designated swimming area. Any swimming opportunity you find would be at your own rsk, and not kid friendly, in my opinion.
You probably don't want to swim though...
There is a pond with canoe rentals,and excess to the river. Very kid friendly,with lots of playground equipment.
Thanks! Your answer is awaiting moderation.