"activities&amp"

Rectangular density set.

Highly Graphic Introduction to the Properties of Acids and Bases

Students discover earth's hidden secrets with the Break Your Own Geodes Kit

This newly designed rheostat features a protective cover.

Students Investigate Alternative Energy Forms

Bearing ball set of 3.

Equilateral prisms, made from high quality clear acrylic sheet.

Children watch and learn as tiny caterpillars turn into beautiful painted lady butterflies right before their eyes.

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

Educational Materials, Mechanics, Poly/Cotton, Break strength 20 lbs., 400 foot spool

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. 

This solderless breadboard is ideal for high-frequency and low-noise circuits.

Perform your electronic experiments on this tiny breadboard (8×5.5×1 cm) . Interconnect any components with 20-29 AWG (3 to 8 mm) wire.

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.

Sand, pebbles, and gravel are all ideal for earth science experiments and simulated excavations.

This sturdy, seamless aluminum can measures 10 cm Ø.

Measure soil quality and learn about pollution.