Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Did you know that an elevator is actually one of the six simple machines? Help your child understand how the pulley works.

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

Did you know that the screw is actually one of the six simple machines? This handy machine helps to make work easier!

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

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.

Alfred Nobel, though he held over 300 patents in his lifetime, is most famous for inventing dynamite.

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