How do you keep a snowman from melting? Which materials work best? We watched Olaf sing his song from “Frozen” and decided why he couldn’t survive summer. We then tested different materials and decided that the tinfoil worked best.  We then looked at the properties of salt and its effect on ice.  Too little and it melts ( great for paths on icy days) but too much salt makes the ice grow colder and we were able to stick two ice cubes together! Amazing!