For Sports Court owners - What games do you play with kids 4-5 years old?

You could try Badminton, four square, hot potato (with the various sized game balls), relays, obstacle courses, capture the flag, red rover, red light green light, mother may I, Simon Says, or Wolf's Dinner Time. Sometimes "organized" sports games can be frustrating for kids of that age, so group games where everyone does it together or as a team work better.

You need to consult a personal injury lawyer familiar with your state tort laws, for each state is a little bite different in liability in regard to parents and the actions of their children It is far from an absolute in civil tort law that parents can be held liable for the actions of their children, if the case in your situation it would leave your only recourse to sue the kid, who does not have assets, so in the end you would have a judgment against a person you may never collect from