Named Wirecutter’s Best Online Learning Games for Kids 7 years in a row
Your Very Hungry Vacuum Cleaner

Your Very Hungry Vacuum Cleaner

How does a vacuum cleaner work? The machine has a really strong fan spinning inside. Instead of blowing air out at you, the fan pulls air -- and dirt, and Lego, and little fuzzies from your sweater -- up into the vacuum. A normal vacuum cleaner can lift about 5 pounds with the hose attachment, and can suck up about 12 gallons of milk every second, so that's a lot of cleaning up!

Make math the best part of the day.

At Home

After School