- Stir 1 tablespoon of baking soda into ¼ cup of water.
- Using a funnel, pour the mixture into a plastic bottle; I used a 16.9 oz. water bottle, but a shorter bottle would work better.
- Add a few drops of liquid dish soap.
- Put the bottle in your kitchen sink.
- Carefully add ¼ cup distilled vinegar to the bottle; keep your face away from the bottle top.
- Watch the eruption!
We had all the ingredients on hand and making the eruption was a snap. My son was thrilled that our afterschool activity took us somewhere other than the table.
Our eruption was an impressive (yet slow) bubbly overflow.
Dowload this worksheet here.
After our eruption, my son cut out the scrambled instructions I’d typed up, read each step, put them in order, and glued them in his new journal. Then, we read Dana Meachen Rau’s book, “Volcanoes: Wonders of Nature.”