Meghan Walbert is Lifehacker's Managing Editor. She has a degree in journalism and has worked at Lifehacker as a writer and editor since 2018, covering parenting, foster care, online child safety, and ...

Kengo Yamada remembers asking a class of kindergartners where they thought wind came from. “One said, ‘Trees make wind,’” says the associate director of early childhood education at New Jersey’s ...

This experiment demonstrates how water at different temperatures has different densities, creating beautiful layering effects. You'll see how warm and cold water interact and learn about density ...

Place cups in a row (I used five cups). Fill the first, third and fifth cups most of the way full. Add food coloring to the water. To make a rainbow effect, add a few drops of blue color to the first ...

What happens when lava and water meet? Explosive experiments with manmade lava are helping to answer this important question. By cooking up 10-gallon batches of molten rock and injecting them with ...