DS turns two in September and I'm struggling with ideas for his birthday party. We will likely have a lot more adults than kids (DH's entire extended family lives nearby), which seems to knock out kid-focused venues like play places, etc. We also probably wouldn't have enough kids to meet the minimum at those kinds of places - we might have 5-6 kids total depending on whether any daycare kids show up.

Any ideas for a venue or activity that would be adult-friendly but still fun for kids? We could host in our backyard but I don't love hosting, so I'm making that my backup option.