I just tried this baking soda/vinegar bomb with Lu and a friend…it was fun and definitely popped, but it was almost more fun to just put the 1 1/2tbs. of baking soda into 1/4c. warm water and 1/2c. white vinegar and watch the reaction. I never tried this as a kid, so it was exciting for me too!
Make Sew Fun
Make Sew Fun 
evia loves this “mad scientist” experiment too! we found it with the title “elephant toothpaste” (a little food coloring) and it’s a frequent hit over here! tnx for your comments on my blog. just saw them. 🙂