Animal giggles
Young children also like to climb into cardboard boxes and things. It seems to be a part of growing up for many intelligent species. However, cats are the absolute masters of the game!
My granddaughter (17 months old) took all the toys out of the toy basket, and then sat in it the last time she was at my house. They're so much fun!
@HippieChick58 Wonderfully so. I love watching how their minds work as they explore their bit of the world.