These #8 rubber stoppers are 33-41 mm diameter with two 5 mm diameter holes.

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This battery connector with wire leads snaps onto any 9-volt battery.

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This unique 2-chambered, molded plastic system is perfect for studying the response of organisms, such as sow bugs or ants, to various environments.

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#7 rubber stopper, solid.

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Designed to fit all our screw base light bulbs. Perfect for exploring electricity and circuits!

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These #9 rubber stoppers are 37-45 mm diameter with one 5 mm diameter hole.

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These #1 rubber stoppers are 14-19 mm diameter with one 5mm diameter hole.

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This pack of seashells is helpful for studying ocean life.

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#7 rubber stopper, 1-hole, fits 500ml Erlenmeyer flasks or 250 ml filtering flasks.

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This spiral-bound notebook is a great tool for teaching kids to record their nature observations with drawings and notes.

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This 60 ml (2 oz) amber glass Boston round bottle is ideal for storing chemical solutions, most solvents, acids and bases.

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These #0 rubber stoppers are 13-17 mm diameter. #0 rubber stoppers fit large test tubes.

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E10 miniature light bulb with threaded, screw base for use with 6-volt battery.

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These #9 rubber stoppers are 37-45 mm diameter with two 5 mm diameter holes.

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These #10 rubber stoppers are 42-50 mm diameter with no holes. #10 rubber stoppers fit 2000 ml Erlenmeyer flasks and many thermos vacuum bottles.

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These No. 2 lab-grade corks fit our small 13 mm x 100 mm test tubes.

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The large 3" diameter of this magnifier makes for convenient viewing.

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These #5 rubber stoppers are 23-27 mm diameter with two 5 mm diameter holes. No. 5 rubber stoppers fit Pyrex 125 ml Erlenmeyer flasks.

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Spring scales measure weight or force by hanging an object from its hook. To measure loose material such as sand, pour into a plastic bag and hang the bag from the hook. Scale is sensitive to 20 grams.

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Disposable 60 x 15 mm dishes & covers. These dishes cannot be heated.

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Home Science Tools 4-pack AAA batteries, 1.5 volt, alkaline. Great for electricity and circuit projects!

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Place this culture tube directly in an open flame to heat your substances! Made of high-quality borosilicate glass, this culture tube has a 10 ml capacity. 125 mm tall. 16 mm outer diameter. Receive one tube per order!

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These No. 4 lab-grade corks fit our large 16 mm x 150 mm test tubes.

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These disposable test tubes are made of clear polystyrene plastic.

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This 30 ml (1 oz.) amber glass Boston round bottle is ideal for storing chemical solutions, most solvents, acids, and bases.

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These #5 rubber stoppers are 23-27 mm diameter.

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Use this mini magnetic compass for designating the direction of magnetic fields in magnetism studies or for making a simple galvanometer for electricity studies.

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Packet contains about 15 seeds.

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Use this 30 ml LDPE dropping bottle to dispense indicators and stains. Bottle includes a dropper tip and overcap.

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Mosquito forceps have a serrated curved point to easily grasp and securely lock, providing excellent control.

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1/2 meter in length. Metric scale on one side, English scale on reverse.

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For static electricity experiments.

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15 ml bottle of glucose syrup, otherwise known as dextrose or sugar. Find the glucose syrup density, formula, formula weight, and more below!

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This handy 12-inch diameter inflatable globe shows continents, countries, major cities, oceans, rivers and more.

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