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Strengthen a Paper Bridge
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In this quick activity (page 1 of the PDF under SciGirls Activity: Tug O' War), learners will test how many pennies a flat paper index card bridging the gap between two stacks of books is able to supp
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How Many Pennies?
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In this math activity, learners pretend there is a special store that lets you pay for toys by their weight in pennies.
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Stack 'Em Up
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In this simple and fun activity, learners build a tower of cups to explore distribution of weight. Learners make predictions about their towers and test their designs.
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Heavy Air
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In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick.
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Fork it Over
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This is an activity about center of gravity. Learners will balance a fork on a glass by finding its center of gravity.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-277.png?itok=letj1n2Z)
Parachuting Pinwheel
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Build a pinwheel that works without wind! This activity contains steps on how to build a parachuting pinwheel out of paper, a film canister, and some brads.
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Tissue Paper Parachute
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In this activity, learners make a parachute out of tissue paper, tape, and string. Then, learners test their parachute to see how many paper clips it can carry.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-295.png?itok=R4PrPQbV)
Flinker
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In this activity, learners make a foam packing peanut "flink"--neither float away nor sink--in water. Learners experiment with materials to make a Flinker that "flinks" for 10 seconds.