You don’t need a master’s degree in chemistry to build a lemon volcano — but don’t tell your kids that. When you combine lemon, baking soda, and soap and let the chemistry take hold, they’re going to think you’re a magician. Kindly correct them and let them know it’s more like the next Louis Pasteur — then tell them all about the advent of pasteurization. This is a learning experience after all, and like all kitchen experiments, a great way to extend what kids get in the classroom. (For all the fun and directions clock here courtesy of fatherly.com)