Social distancing tween boy birthday party

I have a boy turning 12 this summer and we're trying to think of ideas for a birthday party in late August/early September. We may all be back in school and mingling by then, but we want to have some ideas if we or other parents aren't comfortable shucking social distancing yet. He wants to have a sleepover with 4 friends, but there's only so much distancing you can do with 5 tweens in one room. We'd like to have a list of options with a range of likely contact levels to pose to parents. So far, I have some outdoor activity ideas that lend well for distancing (kayaking, horseback riding, nerf battles, paintball, go karts), and some no contact with the help of Zoom (movie watch party, playing the same video game together, outdoor scavenger hunt). With the no contact ones we'd deliver maybe pizza and cake to each family so the boys can still eat "together". Can anyone else help with more ideas that a 12 year old would find cool enough? Typically we've been able to throw great and memorable parties for around a $100 budget, so nothing too grand, though we realize we may have to be more flexible this year.