There are a lot of tutorials on Pinterest on how to make your own tissue paper pompoms. I made a lot of them and put them above one of the beds in our apartment, where Johannes and I usually play and read books.
These days he loves to look at bright and colorful stuff, so I put different “attractions” all over our place for him. And these pompoms are very light so they sway very nicely whenever any wind comes in their direction! It’s like a huge baby mobile, basically.