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What's the Difference?
Source Institutions
In this sorting activity, learners play a game in which they try to identify the largest number of differences between two objects.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-527.gif?itok=HPPymmac)
Shadow Dance
Source Institutions
In this activity, learners experiment with shadows and light sources to understand the relationship between the angle illumination and the shadow's length.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-185.gif?itok=DBa4W8hX)
Make a Sun Clock: Tell Time with the Sun
Source Institutions
Before there were clocks, people used shadows to tell time. In this outdoor activity, learners will discover how to tell time using only a compass, a pencil, a handy printout, and a sunny day.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-201.jpg?itok=jTgakiPA)
Ice Melt
Source Institutions
In this activity, learners will explore basic information about thermodynamics by experimenting with ice. Learners will compare ice melting rates on metal pans or plastic cutting boards.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-012.png?itok=WDgWUKCd)
Universal Indicator Rainbow Trout
Source Institutions
In this activity on page 2 of the PDF, learners discover how color changes can help scientists distinguish between acids and bases.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-350.png?itok=cqBDW0Aq)
Lung Capacity
Source Institutions
This is an activity about lung capacity. Learners will measure their own lung capacity using a homemade spirometer.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-748.jpg?itok=uHytj0R_)
Exploring the Universe: Pack a Space Telescope
Source Institutions
Space telescopes can offer us better, clearer views of the universe (and of our own planet) than Earth-based telescopes can, but getting these large, delicate pieces of equipment into orbit is tricky.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-378.png?itok=hm7Auz_-)
Seismic Slinky!
Source Institutions
Did you know that a Slinky makes a handy model of earthquake waves?
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-536.jpg?itok=6ufDz7qs)
Inkjet Printer
Source Institutions
In this activity, learners investigate how inkjet printers produce tiny, precise drops of ink.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-725.jpg?itok=9F__gqUq)
Water Sphere Lens
Source Institutions
In this activity about light and refraction, learners make a lens and magnifying glass by filling a bowl with water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-719.jpg?itok=flY87hLK)
Eddy Currents
Source Institutions
In this activity related to magnetism and electricity, learners discover that a magnet falls more slowly through a metallic tube than it does through a nonmetallic tube.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-256.jpg?itok=0qxBeC6p)
Cover Your Mouth
Source Institutions
In this health activity (page 3 of the PDF), learners will discover why covering their mouth and nose while sneezing is so important.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-309.png?itok=M1az6Jak)
Great Balls of Goop
Source Institutions
In this activity, learners mix white craft glue and borax solution together to produce a surprising new material: GOOP!
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-516.jpg?itok=uppmTZwC)
Homemade Butter
Source Institutions
In this activity, learners will turn cream and salt into butter—using marbles. Learners will explore how shaking up fat globules help them create homemade butter.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-502.jpg?itok=29FMlgkB)
Nebula in a Jar
Source Institutions
In this activity, learners will build a model of a nebula using cotton balls and colored water. Astronomers photograph nebulas and add colors to provide information about the nebula's composition.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-335.png?itok=OG1oVQxb)
Real Glass Xylophone
Source Institutions
In this activity, learners create a xylophone by filling glasses with different amounts of water and tapping them with a metal spoon.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-453.jpg?itok=pgnIyAaO)
What's the Buzz
Source Institutions
In this physics activity, learners explore how sound is created by vibrations.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-936.jpg?itok=QStSTslU)
Mars Perseverance Activity: Mud Splat Craters
Source Institutions
In this activity, learners explore the physics of impact craters from their own backyard using mud. Learners are encouraged to match features of real impact craters to their models.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-221.jpg?itok=LykqcwS4)
Planaria Fishing
Source Institutions
In this activity, learners capture and observe planaria, which are worms that eat tiny pond critters.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-740.gif?itok=JO0zRTlx)
Magic Wand
Source Institutions
In this activity about light and perception, learners create pictures in thin air.