A more affordable and different item that we currently await through the mail is called a body pod. I think it could be just plain fun, but it's soothing. So are some of the other things we like to keep around like the chair on the porch, a bean bag in the reading room, rocking chairs and the curvy board which is soothing in it's rocking motion.
Kids are so overstimulated these days, and if our kids have any "extra" sensitivity, we really need to find ways to help them process and to find calm. Some people even use a weighted blanket for sleep. I think Eric and I have a similar desire given our down comforter and down blanket on top of us when we sleep. It does cocoon us in many ways.
So we ordered a blue body pod. It'll be like swaddling our bigger kids in a way, but it could also be a really fun rollicking time.
Update: now we have to order another one. They both like to just be in it whether they're moving around or just chilling.