BAKING SODA VOLCANO EXPERIMENT
Building a sandbox volcano is definitely an outdoor science activity with a quick clean up. What we really love about these science activities, is the extra play factor that is organically included.
STEP 1. Fill the water bottle about a third full (mix in optional food coloring) and add about 5 teaspoons of baking soda to it. Put the water bottle cap back on until you are ready.
STEP 2. Build a sand mountain or sand volcano around the bottle.