Rainy weekend activities that aren't screen time?

It's supposed to rain all day Saturday and Sunday here in Seattle. My kids are 4, 6, and 8. We've got board games, art supplies, and building blocks. Any other ideas for activities that'll keep them occupied and relatively sane? Looking for stuff that doesn't require me to be actively entertaining them the whole time tbh - I need like 30 minutes to make dinner without chaos.