The Pre-K kids had fun while learning on Valentines. We did a science experiment- Floating Hearts. We put candy hearts in a vase with water. The hearts sunk. We added baking soda, they still sunk. But when we added vinegar, the bubbles carried the hearts up. If you get the mixture just right, the hearts will go up and down. Try it at home. Making valentine boxes was a great way to practice our names and review all the letters of the alphabet.