Supplies: Styrofoam cup, tape, red food coloring, baking soda & vinegar
Directions: Prepare the cups by forming them into hearts. Bend and fold the top of the styrofoam cup and use the tape to hold it in place. Place a drop or two of food coloring into the cup.
It’s fun to put different amounts of food coloring into different cups to get different shades of red and pink when they all start to fizz! Put about a table spoon of baking soda in the cup.
Then, have the children pour about 1/2 cup of vinegar into the cup. Watch as the heart shaped cup starts fizzing red and pink. My girls like to do a countdown to the heart erupting each time: 5, 4, 3, 2, 1 “go”!