Paint your paper pale yellow and orange. Don't use watercolor paper, it's too thick, but do use strong paper...This turned out to be very important when we did the project with children!
Let the paper dry for a few minutes (you want it to be damp,) and get out your beautiful Neocolor water-soluble wax pastels. You need orange, yellow, brown, and red.
Look at the colors and this nice beetle!
I learn a lot each time I work with children.