Search Results
Showing results 61 to 80 of 88
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-355.jpg?itok=V29d0NzP)
Benham's Disk
Source Institutions
In this activity, learners make a Benham Top to explore visual illusions and optics.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-805.jpg?itok=WJwTiXH9)
CD Spectrometer
Source Institutions
In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-197.jpg?itok=ZQavA-yv)
Shake It Up!
Source Institutions
Learners drop a magnet through a coil of wire to create electric current in a circuit. LEDs in the circuit allow learners to detect the direction of current flow.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-331.jpg?itok=oKOFL4SX)
Built in Stopwatch
Source Institutions
In this activity (3rd on the page), learners investigate circadian rhythms by examining how well people do with estimating time.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-122.jpg?itok=Ta-PXWnh)
Super Spinners
Learners build at least two different spinners (tops) to investigate how mass distribution, size, and shape affect the length of time the spinner spins.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-999.jpg?itok=_4pzAVmU)
The Muddy City: Minimal Spanning Trees
Source Institutions
In this puzzle, learners investigate the decisions involved in linking a network between houses in a muddy city.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-921.jpg?itok=99TQfo--)
Space Origami: Make Your Own Starshade
Source Institutions
In this activity, learners cut out and fold their own collapsible origami starshade, an invention that shields a telescope's camera lens from the light of a distant star so that NASA scientists can ex
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-680.gif?itok=56D3uYCR)
Magnetic Free Fall
Source Institutions
In this activity, learners use a pencil, magnets, and mat board to illustrate Newton's Second Law.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-893.jpg?itok=wF1dICEJ)
Cipher Wheel
Source Institutions
In this activity, learners make their own encrypted code to pass along secret messages using a printable cipher wheel.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-998.gif?itok=sfGxId-V)
Phylogenetics
Source Institutions
This activity lets learners participate in the process of reconstructing a phylogenetic tree and introduces them to several core bioinformatics concepts, particularly in relation to evolution.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-403.jpg?itok=A3pjF9Qh)
Molecular Menagerie
Source Institutions
In this activity, learners use molecular model kits to construct familiar molecules like lactose, caffeine, and Aspirin.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-871.gif?itok=k0vKLOMS)
Atomic Mobile
Source Institutions
Learners make a mobile model of a carbon atom using clay, wire, and pipe cleaners.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-025.jpg?itok=Td284hXH)
Elevator Engineering
Source Institutions
In this activity, learners will use household items to design and build an elevator that will carry 2 passengers to a height of 16 inches...or higher!
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-979.jpg?itok=dk47e5zP)
Slowing the Flow
Source Institutions
In this experiment, pairs of learners explore how cold water affects circulation. The mammalian diving reflex (MDR) slows circulation when the body is exposed to cold water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-990.jpg?itok=npbYdK6Z)
Cryptographic Protocols: The Peruvian Coin Flip
Source Institutions
This activity about cryptographic techniques illustrates how to accomplish a simple, but nevertheless seemingly impossible task—making a fair, random choice by flipping a coin between two people who d
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-199.jpg?itok=whbBX1wU)
Frog Olympics
Source Institutions
Did you know that a bullfrog can jump a distance of 10 times its body length? Learn more about nature's most acrobatic amphibian, the frog, through this set of short, hands-on activities.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-779.jpg?itok=Sna74JUU)
The World's Water
Source Institutions
Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-992.jpg?itok=xxmQDDdb)
Ice Roads: Steiner Trees
Source Institutions
In this outdoor activity, learners use pegs (like tent pegs) and string or elastic to simulate drill sites and roads in Northern Canada.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-488.jpg?itok=1ZiSXBb8)
What's in a Penny?
Source Institutions
In this chemistry activity, learners use chemical reactions to observe the composition of an alloy.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-190.jpg?itok=jUzSjiaC)
Pollinator Bingo
Source Institutions
In this activity, learners will use their five senses to explore a nature-based area around them.