The
other day, on another person's blog (who found it from another blog,
and so on and so on. i'm sorry if i can't give credit to the proper
person--i really can't remember whose blog i found it on, but it truly
is a fantastic idea. i've just discovered so many amazing blogs so
please forgive me) 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