Search Results
Showing results 21 to 40 of 62
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-920.gif?itok=TrufROSt)
Zip Line
Source Institutions
In this design challenge activity, learners build a device to carry a Ping-Pong ball from the top of a zip line to the bottom in four seconds (or less!).
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-326.png?itok=QeLoIyY5)
Marble Ride
Source Institutions
In this activity, challenge learners to design a roller coaster ride for a marble using cardboard and other simple materials.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-488.png?itok=k4QCd7kw)
Pollution Diffusion
Source Institutions
Learners design their own experiment to investigate how pollution diffuses through ground material.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-239.png?itok=Fd4iSEGB)
Sky Diver
Source Institutions
Students design and build their own parachutes in this hands-on engineering project.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-297.png?itok=edqMtztq)
Balloon Flinker
Source Institutions
In this activity, learners make a helium balloon "flink"--neither float away nor sink to the ground. Use this activity to introduce physics concepts related to gravity, density, and weight.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-284.png?itok=aVc-bWcA)
Electric Gelatin
Source Institutions
In this activity, learners explore static electricity and electrical charges while experimenting with an inflated balloon, unflavored gelatin powder, and a wool sweater.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-290.png?itok=lEfdiqMn)
Color Splash
Source Institutions
In this activity, learners mix water, cooking oil, and liquid food coloring to create beautiful colored designs in a cup. Use this activity to explore liquid density and solubility.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-923.jpg?itok=_-xqjUQh)
Sky Glider Challenge
Source Institutions
In this design challenge activity, learners use two helium-filled balloons to build a blimp that can travel in a straight path across the room.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-215.png?itok=5um9EDR6)
Kaleid-o-mania
Source Institutions
In this hands-on activity, learners build their own kaleidoscopes and explore how light can reflect of off surfaces such as mirrors, to produce beautiful patterns.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-416.gif?itok=uNvIrPFs)
Build a Band
Source Institutions
In this design challenge activity, learners build a four-stringed instrument that can play a tune.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-921.gif?itok=4MAqC_S6)
Watercraft
Source Institutions
In this design challenge activity, learners build a boat that can hold 25 pennies (or 15 one inch metal washers) for at least ten seconds before sinking.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-998.png?itok=PuyXyPrp)
Paper Chromatography with Leaves
Source Institutions
In this activity on page 5 of the PDF (Plants—The Green Machines), learners use chromatography to separate and identify pigments within various leaves.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-221.png?itok=VVjN9waf)
Operation Espionage
Source Institutions
In this activity, learners create and reveal secret messages written with invisible ink! The invisible ink is actually a baking soda solution, and the magical revealing liquid is fruit juice.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-615.jpg?itok=U8ER1iZ2)
Polishing Pennies
Source Institutions
In this experiment, learners try different liquids to see which ones clean pennies best. Liquids to try include water, lemon juice, cola, vinegar, and dishwashing detergent.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-110.png?itok=JIU6fpbG)
House Warming
Source Institutions
In this physical sciences activity, learners explore how passive solar design increases energy efficiency.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-104.png?itok=5OKbZxPD)
Breaking Point
Source Institutions
In this activity, learners build penetrometers to test leaf toughness. Biologists measure leaf toughness to study the feeding preferences of insects and bugs.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-169.jpg?itok=KKytsOR2)
¡Ventanas de Burbujas!
Source Institutions
En esta actividad sobre la exploración e investigación, los aprendices harán ventanas de burbujas.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-384.jpg?itok=b3L2gs0q)
Of Cabbages and Kings
Source Institutions
This lesson gives full instructions for making cabbage juice indicator, a procedure sheet for learners to record observations as they use the indicator to test materials, and extension activities to d
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-028.png?itok=Ck3Gk6_O)
Making Recycled Paper
Source Institutions
In this activity on page 11 of the PDF, learners follow simple steps to recycle old newspaper into new paper.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-493.png?itok=dbYnUJsc)
Cool Tool
Source Institutions
In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling.