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

Get charged up about static electricity with this informative fourth- and fifth-grade worksheet!

Did you know that light could bounce? Set up a light obstacle course with a few mirrors and watch light bounce around your room.

Introduce your flashlight to mirrors. Mirrors are cool surfaces that reflect light just as well as they reflect your face.

Children learn the fascinating physics behind lightning, along with a few fun facts, in this physical science worksheet.