We have a state park here in Delaware that has a small water park in it. Its called Killens Pond state park. It is $3 to enter the park for state residents, and then $4 a person to get into the water park. We paid $23 total for all 5 of us to go today, we had a ball. Here are a few pics.
My middle son, myself and my DD
My son Alex walking the lilly pads
my son, DH and our DD