You can make a permanent rainbow with water, clear nail polish, and black construction paper:
Then there's the ever-popular color-changing milk experiment:
Window hangings made with yarn and squares of paint chips:
And my absolute favorite, the rainbow cake. I found the idea here, but it seems my round cake pans are on the missing list, so I improvised. It won't be the same effect when cut into, but pretty all the same!
I took some shortcuts. I grabbed one box of white cake and followed the usual instructions (eggs, oil, water).
Separate into six bowls and color with gel food coloring.
I put mine in a regular 9x13 pan.
And baked, using the instructions on the box.
It's still cooling now, but we'll be frosting it tonight. We've got rainbow sprinkles to add the finishing touch!
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