Dragonflies in action! Using a little plastic toy Sam and Si capture a stunning shot of a dragonfly going head to head with a Lego man! 

Dorothy went over one. LeVar Burton read to us under one. In a song, Kermit the Frog connected us to one. Even Mork's suspenders were made of them. Our culture, and our skies, are full of rainbows, but do you know how they form? Do we all see the same rainbow? Could cyborg-enhanced mantis shrimp eyes someday see a bigger rainbow?

If you’ve ever seen the sun shining through a rainstorm, you probably know that’s the time to start searching the sky for a rainbow! But why? Where do rainbows really come from??

The class finds Ms. Frizzle inside her closet -- playing a pinball machine she created with light pulses instead of steel balls. With time and the light pulses running out, the kids must discover the secrets of color -- before the principal, Mr. Ruhle (Paul Winfield), discovers them!