My 3 year old loves playing her home-school magnets. She does magnet pages and she likes pulling them apart and sticking them together, but she finishes her pages so quickly. I needed another way for her to play with them that kept her playing longer.
I have a deep freeze in my kitchen with an entire side facing out. I took some masking tape and "drew" her name and a few shapes. I told her to trace them in magnets or fill the shapes with magnets and do each letter in a different color, and let her play with them as she saw fit. She's still in there- half an hour later...drawing shapes and letters of her own!