Your mini mad scientist loves mixing up soap bubbles in the sink so why not encourage that early love of experimenting with easy at-home science experiments? We’ve rounded up 20 classic concoctions, most of which call for on-hand ingredients. So get ready to make lightening, grow crystals and launch a rocket right in your homemade lab (well, you might want to do the rocket outside). Plus, we’ve rated each experiment from one to five sponges so you know the messiness factor ahead of time. Click through the gallery to get cooking!

Disappearing Egg Shell

A lesson in: Chemistry.
Can you and the kiddos solve the mysterious case of the disappearing egg shell? Following the simple how-to at Go Science Girls, you’ll learn the step-by-step and talking points about the process along the way. Warning! Although it’s totally non-toxic, toddler aged kids will be tempted to squeeze the egg at the end so make sure it’s a supervised experiment. Visit Go Science Girls to get cracking!
Messiness Factor: One sponge

Photo: Go Science Girls

Want more at-home science experiments? We’ve got glow-in-the-dark science and gross-but-cool science perfect for your home lab! Tell us about your home science fun in the comments below. 

— Christal Yuen & Amber Guetebier