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

Do you know what the Aquarius constellation looks like in the night sky? Complete this dot-to-dot worksheet to find out!

How do clouds form? Why does it rain? Help your student answer some of these questions by completing this water cycle worksheet.

Share a star-gazing session with your little astronomer! This constellation chart is full of fun stories about the different groups of stars.

This angelic constellation is Virgo, one of the twelve special symbols of the zodiac.

This is one angry looking constellation! Meet Taurus, one of the twelve constellations of the zodiac.

Learn your clouds with this coloring series of cloud types that merges science with coloring fun.

Does your birthday fall between September 23 and October 22? If it does, then you're a Libra!

Watch out for this charging ram! The stars in the Aries constellation make up a ram -- if you use your imagination.

If you like scorpions, you may be a Scorpio! Scorpio, Latin for scorpion, is one of the twelve constellations of the zodiac.

Sagittarius clearly isn't your average archer -- for one, he's half a man and half a horse!

Bet you've never seen Capricorn's symbol before -- it's a sea-goat!

Create and observe your very own rainbow using light and water with this science experiment worksheet!

Find out what wind is all about in this intro to earth science worksheet.

Let's play animal hide and seek! Your little zookeeper will learn all about animal camouflage with this adorable worksheet.

Learn about and color in space suits in this three-page science worksheet!

Dig your hands into some earth science with this soil sheet! Your little scientist can hone his reading skills as he learns what soil is and how it is formed.