So a couple of things crossed my mind and others might have mentioned them. An adult playground? They may have these already, but I seriously think I would love something like this.
Or jewelry that has like Disney action figures or things like dinosaurs, My Little Pony, ect.
Also certain clothes, I go to the store and see all these cute little pajamas or daily outfits that have tutus or frilly ends. I wish they made them for adult sizes.
Also bedding, adult queen-king sized beds where I can find a quilt and pillow set that is for Littles would be fantastic. The only sizes I have been able to come across or full or twins, once you reach that queen-sized bed it's all adult designs on the fabric. I want them to have flowers or cars, dinosaurs, trains, sparkly animals, and even space images on them would be super cool!