We did the diet coke plus mentos experiment out in the middle of nowhere. As it turns out, the strength of the reaction depends on the volume of soda, the 2 liters worked better than the 24 oz bottles. After that, we used the bottles to make dry ice explosives. Just pointless fun, it was fun trying to capture the explosions. We struck goofy silly poses for the camera, holding up the broken plastic from the soda bottles. We cleaned up after our selves, as well, and managed to get several ticks throughout the experience. My son learned about liquid, solid, and gas, and why the combination of water and dry ice creates an explosion when in an air tight 2 liter container.