I found these yellow cups at Ikea. They are just the right height for the drawers and are used to sort pom poms and other small multi-use crafty items.
This spinning organizer from Michaels Craft Store ended up being the perfect addition to our craft center, making it very easy to transfer to the diningroom table for the kids to use, and it holds all their markers, colored pencils, scissors, paint brushes, and crayons. The crayons are on a collapsing Crayola tower which fits on top of this storage unit perfectly! Under the crayons is where we keep the glue.
I also display the kids art on the wall above their craft area using Ikea curtain wire.
The craft center storage unit, the storage boxes, and the the curtain wire (for displaying art) are all products from Ikea.
The white spinning storage unit and the storage unit with 4 shelves on top of the craft center are both from Michaels Craft Store.