Ex-NASA Engineer Fills A Pool With Jell-OBy Harvey Shepherd / May 31, 2019 15. Digging a Special Pool youtube.com/Mark Rober The first thing that Mark and his brother did was to dig up a large space where they could fill it with jell-o. They needed a special kind of pool for what they were about to do with it. Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
