That's a fantastic idea to keep the kids busy and let their imaginations run wild! It's great to give them some freedom to explore and decorate their own space - a little nook they can call their own. And I agree, the sense of independence this fosters is wonderful for our children's development.
My daughter loves anything artsy, so when she was younger, I'd often set up a simple art station with paper, colors, and some sticky tape. I found that the simplest things could keep her occupied for hours! I'd also sometimes hide little treasures or treats around the house for a makeshift treasure hunt. She enjoyed searching for them while keeping me on edge with her sniffs and giggles ;P
As she grew older, we progressed to simple cooking experiments - which were often messy but fun! - and science experiments with bubble solutions, colored vinegar, and baking soda. There are so many fun ideas online now, as you mentioned; it's almost hard to choose!
I think as parents, we just have to find that right balance of engaging our kids without wearing ourselves out, heh. We've all earned that much-needed downtime, haven't we?
What other fun treats do you whip up for your little ones during their fort nights? Any recommendations are welcome!