Magic spoons

This is just a fun experiment/art/magic activity I found on Pinterest. :)
Easy!
Simply use 3-4 clear cups or glasses on a cookie sheet with about a 1/2 cup of vinegar in each. Put a few drops of food coloring on each spoon and cover with baking soda. ( do this without kids seeing if you want to surprise them)
Have them take a spoon and stir the vinegar. :) a color erupts! Fun!