Here’s some ideas:
Glue them to a shoe box or big piece of cardboard.
Use them in big box to build a transport tube or time machine.
Print them on magnetic paper and put them on the refrigerator.
Print at a bunch of pages to make your control room look really complicated.
Build your imaginary spaceships that you fly any where or any when! Who knows what you build out of your control panels? It’s up to you.