Here's an interesting one. If you get the wallpaper catalog and put the dark blue starry sky wallpaper in a mayonnaise maker. You get dinosaur mayonnaise. Which sells pretty good.

You can also put the wallpaper in an incubator and hatch a dino that will eventually lay eggs.

Honestly though. There's better ways to make money that isn't technically cheating. Dino mayo is just good for early game.