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Why is the Sky Blue?
Source Institutions
In this activity, learners create a "mini sky" in a glass of water in a dark room.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-269.jpg?itok=IMqB7Mrb)
Powder Particulars
Source Institutions
In this introductory activity and demonstration, learners are introduced to the concept that different substances react chemically in characteristic ways.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-807.jpg?itok=V-x-k5gi)
Electrostatic Water Attraction
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In this activity, learners conduct a simple experiment to see how electrically charged things like plastic attract electrically neutral things like water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-813.jpg?itok=DiK8RCRp)
Suminagashi: Floating Ink Paper Marbling
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In this activity, learners try to float ink on the surface of water to create a pattern and then capture it with absorbent paper.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-708.jpg?itok=7PjUegKS)
Airboat
Source Institutions
In this activity related to Newton's Laws of Motion, learners build a boat powered by a propeller in the air.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-734.jpg?itok=7a0MmmPt)
Polarized Sunglasses
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In this activity, learners explore how polarizing sunglasses can help diminish road glare.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-382.jpg?itok=l1ve3bfl)
Whale Cart
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In this activity, learners interact with whale artifacts such as replicas of skulls, bones, teeth, and baleen (hair-like plates that form a feeding filter).
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-768.jpg?itok=ln-4ylx0)
Writing for Night Vision
Source Institutions
In this activity (page 1 of the PDF under SciGirls Activity: Forensics), learners will use a home video camera with a “night vision” mode to test how various inks appear outside the spectrum of visibl
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-697.jpg?itok=vGEvmj1m)
Digger
Source Institutions
In this activity, learners build their own construction cranes using tongue depressors and pushpins.
Concentrate: Concentrations and Reaction Rates
Source Institutions
Visitors incrementally increase the amount of iodate in three different test tubes containing the same amount of a starch solution.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-380.jpg?itok=f5XNrVzS)
Identify Your Fingerprints
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Learners roll their fingerpads in ink pads, and then press their fingerprints onto balloons. Learners inflate the balloons to produce enlarged versions of their fingerprints.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-140.jpg?itok=0NjL46Hq)
The Rain Man
Source Institutions
In this activity, learners observe the hydrologic cycle in action as water evaporates and condenses to form rain right before their eyes.
Narrow it Down: Numbers
Source Institutions
In this activity, learners will ask yes-no questions to identify a secret number (similar to Twenty Questions). Combine logic and numbers in this game for all ages.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-030.jpg?itok=NaN9W1rq)
Find the Best Way to Clean Oil off Bird Feathers
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In this experiment, learners examine the way oil affects bird feathers and test different cleanup methods to find out which works best.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-742.jpg?itok=VN50_kyS)
Laser Jello
Source Institutions
In this activity, learners use gelatin as a lens to investigate the properties of laser light.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-859.jpg?itok=p-HNUdOh)
Cartesian Diver
Source Institutions
In this quick activity (page 1 of the PDF under SciGirls Activity: California Fish), learners will build a simple Cartesian Diver in an empty 2-liter bottle.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-865.gif?itok=eGjmSG2e)
Moon Watch Flip Book!
Source Institutions
In this activity, learners observe the moon each night for a month and draw their observations in a Moon Watch Log.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-707.jpg?itok=AZbdx-Ur)
Spinning Cylinder: Make a triangle appear on a spinning wheel
Source Institutions
Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-272.jpg?itok=0ranvsbf)
Conservation Island
Source Institutions
In this lesson, learners will understand the concepts behind endangered and extinct animals and develop their own conservation plan to save three endangered species.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-656.jpg?itok=NZbHxDuz)
Mission: Control!
Source Institutions
In this activity and game, learners will train to improve balance and spatial awareness by performing throwing and catching techniques on one foot.