Meet the master of compound machines: Rube Goldberg! His wacky contraptions put a whole new spin on the use of simple machines.

Little scientists can learn about a fundamental concept of physical science with this worksheet all about density!

Crank out a better understanding of simple machines with this worksheet all about the wheel and axle!

Magnets are fun to play with, but how do they actually work? Have your child circle the objects he thinks the magnet will attract.

Introduce the basic concepts of sinking and floating with this fun worksheet. Your budding scientist will decide if these objects sink or float!

Here is a brief introduction to The Great Pacific Garbage Patch for kids!

Wedge your way into physics fun! You and your child can learn a bit about one of the six simple machines with this worksheet all about the wedge.

This worksheet uses a paper bird to demonstrate center of gravity, and practices following directions and fine motor skills.

Searching for a way to help you kid practice their geography knowledge? This printable is a great way to learn the countries in North America.

If a ship went down, would these items sink or float? Your little one will decide, with this fun worksheet to help him hone sorting and categorizing skills.

Teach your child how we measure temperature with these printable thermometers!

This experiment requires only lemon juice, salt, sugar and grapefruit. Your budding scientist can get a great introduction to science by testing her own tongue!

Learn a basic concepts physical science with this fun worksheet. Your little one will decide which objects sink, and which ones float!

Introduce your child to the inclined plane, one of the six simple machines that helps to make work easier for us!

Help your little learner understand the concept of buoyancy with this fun worksheet. He'll decide which items will keep this frog afloat!