I need suggestions peoples

Guys, I'm planning a day to go out with a girl I like plus a few friends, but have no idea what to do for that. It needs to be something casual and fun. I'm just not creative, can I have suggestions?

Also, for some context, I asked the girl I like out to do something casual to get get to know each other but my parents want me to wait until im 16 to go out alone with a girl even if it isn't a date, so I have to go with a group. However I will be picking her up