We get some with some meals mum gets from her work (she works for a diet food company) and it is heaps of fun, though I've never made it into a bomb (would require the lid to be really tight). I once made a stand/launching pad out of some old lego and used a water bottle to launch it straight up into the air. It went so high that it literally took like 20 seconds for the bottle to appear again. It was very fun, my next plan (when I can be bothered) is to get some poly pipe and make like a rocket launcher out of it