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These balloons can be used with the Fold-N-Roll cars to turn them into balloon-powered vehicles!


Set of eight 12-sided dice in assorted colors.


5 mm x 20 mm fast-acting two-amp fuse for use in the Injection Molding Machine. Quantity: One fuse.


Safer than standard measuring tapes, the Wind-Up Tape Measure features a sturdy case that rewinds a vinyl tape with a manual rewinder – no spring recoil or metal tape that cuts. Plus, a flexible handle on one side makes it easy to hold. Measures 30 meters (100 feet).


This adjustable screwdriver features two capped ends – an end with a Phillips head and an end with a flat head. Plus, each end features a small and extra-small size – just pull out each end and flip it around to the other style of head. Great for small projects and electronics. Features a clip to help keep it in your pocket so you don’t lose this handy tool!


Great for homemade launch systems.


The durability of nickel-plated brass combines with the strength of fiberglass-reinforced plastic to create this light, yet nicely balanced, large 6" pencil compass. Designed especially for educational use, it will draw a circle up to 11-3/4" in diameter, and its built-in stop helps keep students from overextending the legs. Each compass comes packaged complete in a soft plastic sheath with a tube of lead.


These durable plastic holders come in either a one, two, three, or four AA-battery holder.

If you use the one-battery holder, the output will be 1.5 volts. If you use the two-battery holder, the output will be 3 volts. The three-battery holder puts out 4.5 volts and the four-battery holder output will be 6 volts. If necessary, these can be used on a cloudy day to test your Junior Solar Sprint cars. Just hook up the batteries and test your solar vehicle without the Sun!

Options Available
From $1.35

For small robots, electric cars, and other motorized projects, our Battery Holders will come in handy. Holding either two, three, or four AA batteries, they have their own switches, so the motorized object doesn’t need one. And, they come with leads and a removable cover.

Options Available
From $2.15

This water-soluble, opaque acrylic paint brushes easily and covers rapidly. It cleans up easily with water but is permanent when dry. Its convenient thinning and fast-drying characteristics make it particularly desirable for wood, metal, paper, or canvas. Contains eighteen 1/2-ounce jars. Colors: Avocado, Medium Blue, Gold, Sandalwood, Parrot Green, Shocking Pink, Beige, Brown, Black, Purple, Brick Red, Orange, White, Lilac, Vanilla, Yellow, Cadet Blue, and Red.


This material makes excellent rigid fins yet is easily cut with scissors. Available in two sizes. Enough for three small fins.

Options Available
From $1.39

Lab label for Alternative Energy module. Measures 3" x 6". Printed on matte vinyl mounted to 40 pt polystyrene.


Cut your dragster’s axle weight in half by using aluminum instead of steel! Buy these 1/8" diameter axles precut, or cut your own from our three-foot lengths. Use the Precision Metal Saw to cut axles to desired lengths.

Options Available
From $0.85

Extruded aluminum with clear anodized finish. Screened, thermal-bonded black gradations in eighths of an inch and millimeters. Width 1-1/8".


In just 10 seconds, these test strips measure ammonia levels from 00 to 60 ppm (mg/L) in freshwater and saltwater aquariums. Package of 25 test strips. Note: Brand may vary from that shown.


One full sheet of 1" x 3" Fossil Hunt Kit labels for the Animals module.