Vinegar + Baking Soda
When combined, vinegar and baking soda cause a fun fizzing and foaming reaction.
We added food coloring to ours for "pretty" eruptions. :)
You can actually do this a few ways. (here's another)
But here's what we did
I filled 4 plastic cups with vinegar (not the jars you see above), and added different food coloring to each one. I then set 4 different jars on a cookie sheet (you REALLY want a cookie sheet under your jar because everything will erupt up and over). I scooped lots of baking soda into each jar. Then to make eruptions we simply poured our cups of colored vinegar into the jars of baking soda. We did one jar at a time until the ooos and aaahs were over, then moved on to the next jar. The faster and the more vinegar you pour into the jar, the bigger the eruption! You may want a few jars of vinegar, because it's really fun but over quickly!
Sorry for the lack of pics, this is actually something
we did this past winter, but I just found a picture of.
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