My daughter is going to have an art themed birthday party, and I want to have a bunch of stuff they can create with. But I don't have much of a budget.
Check out big box stores like Michael's, WalMart, Dollar Stores, Rite Aide, Target. Also look in the discounted section and the party section for inspiration.
Dick Blick has anything and everything you could need. Since this is a childs party I would suggest buying tempera paints and other water soluble pigments. You should also get cheap paper and some kind of drop cloth to protect your floor.
Dollar Tree has a varying assortment of supplies such as crayons,paints and construction paper.Other places you should look are Big Lots,Party City,and Michael's.After every holiday the latter have sales.