So we will be having our second indoor day tomorrow. My group spends a lot of time outside so they are not used to extended indoor time.

We have tons of things on the go tomorrow but I know there will be future days to come. Has anyone had a really cool indoor theme day they did? We have had a pajama day and beach party day in the past. We are TV free so a movie day wouldn't work (and wouldn't hold the young ones attention for more than 5 mins anyways). Other ideas? My kids are good with free play, just looking for something fun for them to get excited about.