I have fun creating these for you guys. Are you using them? Let me hear from you in the comments!
So, this being our 40th challenge (!!!) how about create something celebratory? A cake, a cupcake, a balloon bouquet! Use bright colors, but be sure to use various value ranges of those colors to prevent your piece from looking flat. Because, nobody likes a flat cupcake.
Want to know more about why you need to mix up your values? Read my article: Illuminating Color.