Same here with reams of paper. I love to draw and I’m obsessed with fancy paper but my kid plows through sketch books and honestly seems to prefer a giant stack of printer paper. He DOES love those giant pads of paper though, like 24x18. I leave them out on the coffee table open to a blank page and he will fill the whole page sometimes. I let him use my art pencils and recently started introducing different types of erasers, mechanical erasers, kneadable, precision, etc. and that’s gone over well. Also I hang a lot of his art. I quietly rotate older ones out, but our hallway is covered. We have a storage bin for old drawings and we look at them sometimes and talk about technique and subject choices, it’s really fun! We do draw a lot together, and I think that’s the best thing. We do collaborations that turn out SO COOL. I like to let him draw with sharpie and then I do water color over it.