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7) 42 digits of Pi (because we could)
Doubles as a pocket ruler and protractor
The best of both worlds - A switchable red and green laser pointer all in one
If you're used to doing gelatin lens molds
hands-free on-off switch
Super Safe Red Laser Pointer (Class 2) K-8 7) 42 digits of PiClassroom safe Class 2 (<1 mW) red laser pointer for science classroom investigations exploring geometric optics. Use it to teach and learn about the science of light and optics: reflection, refraction, diffraction and more. It's low power and extremely safe, yet visible. Recommended for working with elementary and middle school students. *This laser pointer is also compatible as a replacement part for NewJoy and Inspira quilting frames. Has a black