The change over 100 years.
A tick stick is used to quickly and preciously copy and make a pattern of any odd or complicated shape where using a ruler would be challenging. The ticking stick was made popular by boat-builders and is a way of measuring accurately which has been around for centuries.
Joe Marler
Elephant's toothpaste is a foamy substance caused by the rapid decomposition of hydrogen peroxide using potassium iodide or yeast and warm water as a catalyst.
