Kids need their own space to be creative so build the kids a craft table. Also perfect for doing any homework they might have.
If your kids want someplace to do their thing, maybe it is time you built them a desk of their own. This one was built using plywood. Follow along at the link to see how it was built.
You could build a plain desk for your child but you could also build this house frame desk for bonus points. Follow the free step-by-step plans at the link.
Build this beautiful kids desk with storage using these free woodworking instructions. You can modify the height of the desk if you are building it for an older (bigger) kid.