Fun Science Experiments for Kids ~ Hydrofoils

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This fun and easy hands-on science experiment, using three ingredients you already have, is perfect for warm weather outside, or not-so-nice weather inside. Hydrofoils use water (that’s the hydro) and tinfoil (yup, you guessed it) to demonstrate the concept of buoyancy.  

Big thanks to Holly Homer and Rachel Miller of Kids Activities Blog and their new book {affiliate link}101 Kids Activities That Are the Bestest, Funnest Ever!: The Entertainment Solution for Parents, Relatives & Babysitters! for some fun science experiments for kids, including this one. More on their fab book in a minute.

Hydrofoils:  Water Science Experiments for Kids from "101 Kids Activities that are the Bestest, Funnest Ever!"

Supplies Needed

  • Water in a container, bathtub or sink.
  • Tinfoil.
  • Pennies.

This experiment is about design:  Designing a boat that can float well and hold the pennies without taking on water, testing it and re-designing it again uses critical thinking skills

Fun Science Experiments for Kids - Hydrofoils @creeksidelearn

I gave the kids two different types of tinfoil, one was heavier than the other, but I let them discover that for themselves. They each set out to build, test and re-build their boats.  

While they worked, we talked about the concepts included in the experiment from the book:  Water pressure pushing up and gravity pulling the boat down. That’s buoyancy. 

 Fun Science Experiments for Kids - Hydrofoils

They made big foil boats and small foil boats and experimented with flattening the bottoms of the boats by pressing them on the sidewalk. 

Hydrofoils were a hit! We hope you will like them, too.

101 Kids Activities That Are the Bestest Funnest Ever by Holly Homer and Rachel Miller

101 Kids Activities That Are the Bestest, Funnest Ever!: The Entertainment Solution for Parents, Relatives & Babysitters! contains even more fun science experiments for kids, as well as crafts, games and boredom busters.  I love how each activity contains clear instructions and way to modify things for older or younger kids.  Each activity is geared towards kids from toddlers to 12-year-olds. Holly Homer and Rachel Miller are on a mission to create great activities for kids every day. You can find them at Kids Activities Blog and on Facebook and Pinterest

For more summer fun and learning ideas…

 Follow Julie Kirkwood, Creekside Learning’s board Summer on Pinterest.

I received this book for free for the purpose of review. All opinions are my own. Read my disclosure page. Affiliate links in this post go to Amazon. I receive a small commission, at no extra cost to you, if a purchase is made via these links. Thank you.