I promised my 2 and 4 year old that I'd take them to the pool after their nap... but then they took forever to fall asleep and by the time they wake up, it will be too late to go to the pool! I mean we could still go, but we'd only have about half an hour or so before it closes.

What's a fun evening activity that we could do instead of going to the swimming pool? ETA: Ideally it'd be something outdoors so they could burn off some energy running around...