This is EXCELLENT!!! Actual science and fun and asking interesting questions and trying different materials to monitor efficacy! I have never done this experiment but have always wanted to pull it out at a Halloween party! Great video :)
Im really not afraid of much..... I use to repel out of helicopters but Im a little afraid of heights...... but yet I still forced myself to do such things as a younger man.. was it pier pressure? was it bravery? I would not do it today, so I try making sense of it...
The sand is there just to provide a safe substrate that won't melt or transfer the heat very well. You could use a frying pan lined with tin foil. It may not work quite as well, but you would have the same effect.
