Van Gogh repeated strong, swirling lines to convey movement and emotion in this famous painting. To start, turn your paper horizontal. Use the yellow crayon to draw and color in a crescent moon on the paper. Then add several curling and swirling yellow lines and use the gray, white, and black crayons to do the same so they outline each other. Place star stickers on the paper. Use diluted blue watercolor paint and then cover the moon, swirling crayon lines, and star stickers with the paint.
This would fascinate kids. And me.
Rainbow roses, you can do this by splitting the stems into strands and placing each one in food colouring the roses draw the liquid colouring into the petals, amazing!