Welcome to Steve Spangler Science. Skip directly to: main content, navigation, search box.

Magnetic Tennis Balls

Ordinary tennis balls hiding super-powerful Neodymium Magnets.

  • Magnetic Tennis Balls
    Item #: WMTB-100

    $34.99 In Stock

Usually ships out the next day.

Recommend for 8 years & up with adult supervision.

DOTD Sold-Out

Today's Deal has Sold-Out

These balls look like ordinary tennis balls, but they are hiding super-powerful Neodymium Magnets! When the two balls come close to each other, they stick together! Unprotected, these Neodymium Magnets are so "attractive," they'll knock iron chips off each other if they get too close! That's why the tennis ball disguise makes it safe for even the youngest scientists. Magnetic Tennis Balls are perfect for Discovery Centers. Each set contains 2 balls. Recommended for children ages 8 and up.

What's included?

  • 2 Magnetic Tennis Balls

How does it work?

Neodymium magnets also contain Iron and Boron, making them some of the strongest magnets in the world. Magnets of all types create a magnetic field, with both a north and south poles. The magnetic field created by the neodymium magnets is so strong; if you throw the two tennis balls in the air, they'll stick together! Once you start playing and experimenting with them, you'll never put them down!

What does it teach?

Teachers and older students can use Magnetic Tennis Balls to demonstrate the "attractive" forces between molecules (hydrogen bonding, for example). Younger students discover the science behind magnetic fields, friction, and the magnetic poles of the earth.

non-contact forces in action

Daphne N. Dunn    -  May 9, 2013

1 2 3 4 5
This user gave 5/5 stars


These magnetic balls were exactly what we needed to provide the necessary "gravitational" force on our ball bearing "spaceships" as we explored the factors involved in planning a gravitational trajectory assist (planetary slingshot) like that used by both Voyagers to make it out of our solar system. Fun!

5th grade

bob karimi    -  June 16, 2012

1 2 3 4 5
This user gave 5/5 stars


my sons 5th grade techer loved them

Preschool

Cheri    -  December 11, 2010

1 2 3 4 5
This user gave 5/5 stars


WE put these balls in our magnet table. The kids love them. Teachers thought I had somehow managed to put the magnets in the tennis balls - give me too much credit.
I told them it was my "friend" Steve Spangler

6th Grade Science Teacher

Ellen Windsor, VA   -  December 19, 2009

1 2 3 4 5
This user gave 5/5 stars


Bought these for a math teacher friend who has a science toy habit. Juggling with these is NOT an option, unless you want your class to laugh & have fun.

Write your own review for this product.