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Two Washers
Source Institutions
In this activity, learners create a mind and math puzzle that requires a three-dimensional solution.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-690.jpg?itok=PzwPJpxp)
Matraca
Source Institutions
In this activity, learners create a traditional Mexican noisemaker (a matraca) using cardboard, craft sticks, and a wooden dowel.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-117.jpg?itok=Yq5LvluE)
Mini Zoetrope
Source Institutions
In this activity (posted on March 27, 2011), learners follow the steps to construct a mini zoetrope, a device that produces an illusion of action from a rapid succession of static pictures.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-699.jpg?itok=uxJY8ipd)
Bobbing Eyeballs
Source Institutions
In this activity, learners use simple materials and basic tools to construct a special toy to explore pendulums. As the head of the toy bobs one way, the eyeballs bob the other way.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-705.jpg?itok=LMGNJNJ9)
Rubber Band Racer
Source Institutions
In this activity, learners construct speedy vehicles made out of paper plates and powered by twisted rubber bands.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-687.jpg?itok=kWflrAgh)
Spinning Illusions
Source Institutions
In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-693.jpg?itok=bg_DzERZ)
Gymnast
Source Institutions
In this physics activity, learners build a toy with a figure that spins around like a gymnast on the high bar.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-694.jpg?itok=yTjZAaSE)
Geometry Construction: Polyhedral Playthings
Source Institutions
In this activity, learners create 3D geometric shapes using straws and pipe cleaners.
![](/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-000-000-002-700.jpg?itok=3SRulhDd)
Two-String Yo-Yo
Source Institutions
Learners build a yo-yo using a piece of wood, PVC pipe, and string. In doing so, learners explore the force of gravity and angular momentum.