A couple we know have a house in the countryside outside of St. Louis. It's where we went to see the solar eclipse last year. There is a big pond, access to the Meramec River, big fields and ATVs. They host an annual summer party with lots of activities for children.
Mrs. C, Emily and Ellie attended. (I was stuck in the office writing the materials for a talk I'm giving at an upcoming legal conference.) There was a fishing derby for the little ones and guess who won the prize for the biggest fish? It was all of 7 inches / 18 cm long but my was she proud. It's an activity I could not have helped her with. You wouldn't want to eat anything you caught in the waters where I grew up.
At some point several of the children were in the pond playing shark. You can see who took on the role of Jaws.