Protect your table with a plastic mat. Then put a clean piece of cardstock on top of it.

Grab your paper towel and draw a big, bright rainbow with your markers.

Fill your dropper with water and start squeezing out drops onto your rainbow. Watch the colors blend and spread – it's kind of like magic! You'll see some color on the cardstock underneath too.

Once you're happy, lay another sheet of cardstock right on top of the wet paper towel and gently press it down. This will help the bottom page soak up even more color.

Lift the top page off – ta-da! Now let the paper towel dry a bit, then peel it off to see your rainbow on the bottom page.