"serv Dial Sud & sars"

Four gears of different sizes, perfect for any investigation or maker project.

Operates 1/2 to 3 volts, 100ma start-up / runs at 15ma no load.  Strong torque - 300 RPM @ 1/2 volt. Great for gear drives.  2mm shaft dia. Size 1 1/4" dia x 1 1/4" long. 

Lessons in Optics and Light in the Palm of Your Hand Colorfully illustrate additive and subtractive color mixing, color transmission, absorption and filtering of the different wavelengths of light with this set of primary and secondary color mixing paddles. You can also use the diffraction gratings in this set to view spectra from different light sources. Show students how a spectroscope, colored lights, and even polarized sunglasses work with the contents of this set.

The Sunprint Kit includes sun sensitive paper to help you make photographic prints using the power of the sun.

Each vial is a dropper bottle with enough freeze-dried serum to make 5 mL of reconstituted serum

WARNING: CHOKING HAZARD–This toy is a marble. Not for children under 3 yrs.

Mark Evidence for Photography

Two sets of popular tuning forks are available.

Both versions of these economy tuning fork sets come with a mallet designed for one hard and one soft end for use with all frequencies of forks.

The Large Wave form helix easily demonstrates wave phenomena.

Smooth-running ball-bearing clamp pulley for use with inclined planes, force experiments, or demonstrations of work and machines, this durable, lightweight plastic pulley fastens to surfaces up to 18 mm thick.

Fast, Easy, and Accurate.

Watch work and energy intercept.

Students construct simple motion experiments with this machine.

Add your own lab materials to illustrate torque.

This unit visually reinforces heat conductivity lessons.