I was on Pinterest for work yesterday and came across some fun activities for kids. I followed the links and got lost in a maze of blogs by mothers who are obviously much more awesome than I am. Some had really easy, fun ideas, including this post on Bubbling Boos and Popping Pumpkins.
I’ve read about exploding chalk paints before, but never tried them. I decided that we should do it. So we made three bombs, a ghost, a pumpkin and a zombie that sort of turned into Frankenstein.
The concept is simple. You add cornstarch, vinegar and coloring to zipper bags and shake. Then you put baking soda in a piece of toilet paper and fold it up, carefully insert it into the bag, keeping it away from the liquid and seal the bag up again. You shake it hard and toss it on the ground. Here’s what happens.
First, it puffs up bigger and bigger. This causes kids to scream and run backwards, shouting, “It’s gonna blow!”
Then it pops! Gooey guts everywhere. It’s more of an ooze than an explosion, as in, there is no paint flying all over the place.
This provides a LOT of excitement.
Dominic couldn’t wait for the pumpkin to explode, he started batting it all over until it popped!
Afterward, the boys played for a while in the fizzing good. (you can see we made one more pumpkin bomb with the last of the vinegar.)
Overall, this was a very simple activity to do and we had a lot of fun with it! The kids were busy for a while afterward, mucking around in the goop and then washing it all down the drain. Which led to a water fight, but anyway.
The original instructions didn’t include amounts, but I used about half a cup of vinegar in each bag, plus 3-4 tablespoons of cornstarch. I also used food coloring, which I do NOT suggest. Use liquid watercolors or tempera since the food coloring stained the concrete a little. It will eventually come off, but in the meantime, we have green and orange stains. I used about a tablespoon and a half for the baking soda and that worked just fine.