Hellobee Boards

Slick sticks are one of our favorites, my daughter even likes then more than markers!

I used to love those pencils/pens that had more than one color. Like these: https://www.amazon.com/Towallmark-Rainbow-Colored-Pencils-Stationery/dp/B00ZZMRZY2/

I should probably go grab some for DS now that I remember them!

I bought my son several doodle pads, I don't know the official name for them, but they've got some preprinted designs on the page, like a window or a dinner plate and you fill it in. It's sparked some interest outside of his standard things he draws on his own. His favorite medium seems to be markers, I think he likes it best because he gets the boldest colors from it.

I also provide a lot of stuff that can be used for collage, my son has kind of moved away from coloring and drawing to more dimensional work, so he uses things like tissue paper, washi tape, cardboard.

@Bao: I would try out some acrylic paint and 8x10 canvases

She may still be a little young, but the Usborne I Can Draw books look pretty good. I was just looking at them for my niece before the holidays.