Pinterest...I just recently joined the many others and what a great way to organize all the lovely ideas/resources that we have on the web! I am not "addicted" (yet) as some seem to be LOL but I do think it's going to be a great time saver for me! Anyway...this was an activity that I saw on Pinterest and it's one of those "why on earth hadn't I thought of that!" projects. The children LOVE volcanoes and the bottle balloons but not once have I ever just put baking soda on a tray for them to explore with. So I remedied that and we did the project within a week of me seeing it on Pinterest. :-P
vinegar and baking soda
We chose to use primary colored food coloring to reinforce coloring mixing.
A closeup of one spot on the tray...is that not cool or what?!
And he touched it!