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Free STEM activities, lessons, and resources for all learners.
Write Your Name In Binary Code
Want to write like a computer? Here’s your chance to get started.
How Many Licks? Controlling Lollipop Licker Variation
How many licks does it take to get to the center of a Tootsie Pop? Navigate the perils of licker variation by designing your own lollipop-licking experiment.
Track A Plant’s Movement
Are your plants moving without you knowing it? Catch your plant’s secret movements, called tropisms, in this hands-on activity.
Jet Propulsion Locomotion Of Squid And Octopus
Can you engineer a jet propulsion system that mimics the speed of a squid?
Dissect a Silkworm Cocoon
Learn about the insect origins of silk by dissecting a cocoon and “degumming” it to reveal the protein that scientists use for constructing new materials.
A Human Sundial
Why does the length and direction of our shadow change throughout the day? It all comes back to rotation and position of our planet relative to the sun.
Solar Convection
Use hot and cold water to see how fluids at different temperatures move around in convection currents in this DIY Sun Science Activity from Lawrence Hall of Science.
Map Sun Trails
Use photosensitive paper to make a map of the path of sunlight on the earth in this activity from the Lawrence Hall of Science.
Spot the Sunspots
Use binoculars or a telescope to identify and track sunspots. You’ll need a bright sunny day for this DIY Sun Science Activity from Lawrence Hall of Science.
Make a UV Detector
On a bright, sunny day, use tonic water to detect ultraviolet (UV) light from the Sun in this DIY Sun Science Activity from Lawrence Hall of Science.