The other day, on another person's blog (who found it from another blog, and so on and so on) i saw instructions on how to make 'scratchy rainbow paper.' it's not unlike the black paper that one uses a special marker to reveal the colors underneath. the only thing different is one 'scratches' a picture rather than using a marker with either a toothpick, coin, fingernail, etc.
here's how we did it:
first we colored with crayons onto thick white paper, being careful not to leave any white spaces with the exception of a border (so kids don't scribble on the table). the paper should be almost waxy:
it took a long time for everyone to finish because you should try to use as many colors as possible:
for the next step we had to move into the kitchen because it was going to get messy: we mixed two tablespoons of black tempera paint with one drop of dish soap:
then using a paintbrush cover completely--but not too thick!-- the entire colored surface:
after all the colored parts are colored it will take about an hour or so to dry. it's important to make sure it's REALLY DRY:
Finally, take your implement of choice (toothpick, back of spoon, fingernail, chopstick, etc) and 'draw' your picture:
other colors of paint could be used, but i think the most striking results come from using the black paint =D