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Fossil Age Estimation Model
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In this activity (page 1 of the PDF under SciGirls Activity: Dinosaurs), learners will model how paleontologists estimate the age of fossil discoveries by extracting “fossil” playing cards from newspa

Watercraft
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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.

Exploration Tank
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This is a guide for facilitating interaction at a touch tank with marine animals. The instructions are for setting up a display in an informal science center, but could work anywhere.

Modeling Tidal Action
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In this activity (Lesson 1), learners work in groups to create tide simulations.

Three Colors of Light
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Have fun with additive mixing! Observe what happens when the three primary colors of light--red, green and blue--are mixed together, resulting in white light.

Build A Dome
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In this activity, learners explore the structural strength of triangles by creating their own free-standing geodesic dome out of plastic straws.

Pollinator Play
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In this activity, learners will build a bee hotel for pollinators. Learners will explore building and ecology through this activity.

Magnetic Lines of Force
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With a magnet, iron fillings, and a bottle, you can create a cool demonstration about magnetic lines of force: the fillings will arrange themselves within the magnet's magnetic field.

T-Shirt Transformation
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In this activity, learners will repurpose an old t-shirt to create their own yarn or string.

Composites
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In this activity, learners explore how composites work by creating and testing their own composite for an imaginary company.

Cactus Wheel
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In this outdoor activity/field trip, learners explore the concept of population density.

Make Your Own Ant Farm
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In this outdoor/indoor activity, learners collect ants and dirt to create an ant farm in a cup that they can observe over time.

3D-ection: Molecular Shape Recognition
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In this activity (page 12), learners explore how molecules self-assemble and how molecules must fit together, like a lock and key, in order to identify each other and initiate a new function as a comb

Coral Polyp
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In this activity, learners will create their own coral polyps - the basis for a coral reef.

A Slime By Any Other Name
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This fun video explains how to make a batch of oobleck (or slime) and why this special substance is known as a "non-Newtonian" fluid. Watch as Mr.

Which Parachute
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In this activity, learners will engineer three different parachutes to test how well each one works.

What's the Difference between Weather and Climate?
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In this interactive and informative group activity, learners use packages of M&M's to illustrate the difference between weather and climate.

There's Always Room For JELL-O
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In this activity, learners cut wells in JELL-O© and load the wells with different detergent solutions.

Detectives de arena
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¡En esta tira cómica, Mateo y Cientina son detectives! Ellos usan sus destrezas investigativas para identificar de dónde provinieron algunas muestras de arena.

Sky Glider Challenge
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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.