To help entertain the kids at home during COVID-19, I got a pack of Melissa & Doug On-the-Go Origami Animals.
These turn out to be a big win for preschoolers, much more enticing than traditional origami books. Even though latter are also very colorful and filled with similar kinds of children friendly models. It's just much easier to point at the cover, flip through the instruction or look through the accompanied papers for what they want. Sparkly accessories (eyes, nose, antenna etc) helps too.