I like the organization, and the room in general. but I think white for an arts & crafts room is a TERRIBLE idea. unless this is before you started arting and crafting the room!
What a great use of an IKEA staple! My Sweet Savannah: ~pantry made with Ikea bookshelves~ - Kitchen Today
Use galvanized tubs to keep the outside toys where they belong. Via Domestic Charm: Organizing Outside Toys Garage