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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-000-000-004-129.png?itok=tqS9s-Z5)
3D-tection: Trying to Fit In
Source Institutions
In this activity, learners explore how molecules must fit together, like a lock and key, in order to identify each other and initiate a new function as a combined unit.
![](/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-000-000-001-915.jpg?itok=zw7gB5l0)
Speedy Shelter
Source Institutions
In this design challenge activity, learners invent an emergency shelter that can fit a person and is sturdy and quick to build.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-642.jpg?itok=YzjZSwZa)
Penny Battery
Source Institutions
In this activity, learners light an LED with five cents. Learners use two different metals and some sour, salty water to create a cheap battery.
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Let's Make Music
Source Institutions
In this activity, learners will create their own percussion instrument with recycled materials. Learners will explore design, fabrication, cause and effect and sound through this activity.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-049.jpg?itok=RfKpRTvO)
Popsicle Bridge
Source Institutions
In this activity, learners explore how engineering has impacted the development of bridges over time, including innovative designs and the challenge of creating bridges that become landmarks for a cit
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-409.jpg?itok=U_e5Hyki)
Secret Messages
Source Institutions
In this activity, learners use Teflon (PTFE) tape to write secret messages.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-154.jpg?itok=oIMfm3f3)
Balloon Car
Source Institutions
In this activity, learners explore force and motion by constructing cardboard cars that are propelled by balloons.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-688.jpg?itok=cgEsPCBc)
Slide Whistle
Source Institutions
In this activity, learners build a slide whistle using PVC pipe, bamboo skewer, and piece of foam. Construction of the instrument is relatively simple.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-039.png?itok=-c5Wa_Hx)
Pop Can "Hero Engine"
Source Institutions
In this activity, learners build water-propelled engines from soft drink cans.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-510.png?itok=2QJ6-LL_)
Exploring Fabrication: Self-Assembly
Source Institutions
In this activity, learners participate in several full-body interactive games to model the process of self-assembly in nature and nanotechnology.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-949.jpg?itok=QBTKM4q2)
Roller Coasters
Source Institutions
In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-071.jpg?itok=SHhJbT_V)
Bernoulli Brain Teasers
Source Institutions
In this activity related to flight, learners conduct two simple tests to explore how lift works.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-504.jpg?itok=Y5Tl3vy0)
Exploring Size: Ball Sorter
Source Institutions
In this activity, learners use sieves with different-sized holes to sort balls by size.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-830.png?itok=jqd0vYid)
Great Steamboat Race
Source Institutions
In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-034.png?itok=73WAe8tX)
Safe in the Sun
Source Institutions
In this activity on page 13 of the PDF, use a special plastic card that has been painted with a chemical that changes color when it is in UV light.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-376.png?itok=hsHrCq1i)
Build Your Own Marble Machine
Source Institutions
In this activity, learners will build a ball run contraption.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-020.png?itok=OCpzK8i7)
Milli's Insulation Investigation
Source Institutions
In this activity on page 2 of the PDF, learners test different materials to find out which is the best insulator.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-617.jpg?itok=-TIfGxS4)
Sail Car Design
Source Institutions
This activity (on page 3 of the PDF under GPS: Sailboat Design Activity) is a full inquiry investigation into design optimization.