I've got back to back birthday parties to plan for my kids so party supplies have been on my mind. I was looking for a way the kids could help with their own party decorations when I spotted these watercolor paper cups.The execution looks simple enough - white paper cups and good quality paint. To keep things tight, choose just a few colors to let the kids choose from for painting or let them go wild and use whatever they like. Just remember to keep the paint away from the lip of the cups where your guests will be drinking form. For detailed instructions on this creative project, run over to Design Sponge.