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Geometry Construction: Polyhedral Playthings
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In this activity, learners create 3D geometric shapes using straws and pipe cleaners.

Make a Dinosaur
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In this activity, learners explore the size and scale of dinosaurs. Learners listen to "Dinosaurs, Dinosaurs" by Byron Barton to understand some background information about dinosaurs.

Bouncing Yo-Yo
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In this activity, learners build unique yo-yos, which spin round and round without moving up and down.
Animal Math Posters
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These math posters have questions written on them, such as: How fast can a cheetah run? or How long can a giant tortoise live? Post these around the room or leave them out for children to explore.

Take a Hike!: A Family Forest Walk
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In this family or group inquiry activity, learners use their senses to explore a local forest or woodland.

When Pigs Fly
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In this math lesson, learners explore probability.

Science Cooks!
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In this health, cooking, and math activity, learners explore nutrition and examine nutrition labels.
Mystery Jars: Make Your Own: Estimating and Counting
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Learners make a counting/estimating jar to exchange with friends or bring home.

A Matter of Splatter
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In this math-based activity, learners will experiment to find how height and angle affect spatter and then use this knowledge to solve a crime.
Building Houses: Build a Cardboard Tube House
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Build a house you can fit inside, using cardboard tubes.

Comparing Sizes of Microorganisms
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In this activity related to microbes, learners create scale models of microorganisms and compare relative sizes of common bacteria, viruses, fungi and protozoa using metric measures: meters, centimete

Skewers and Garden Poles
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In this activity, learners build scaled-down structures and cantilevers in a series of "building out" challenges with bamboo skewers and tape.

Join the Dinosaur Age
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In this activity, learners rotate through several learning and play stations to explore dinosaurs and paleontologists.

Tops
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In this activity, learners discover that some things only stand up while they are spinning.

Stereoscope
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In this activity, learners construct a device that allows them to view 2-D images in 3-D.
Giant Museum: Create a Scale Model
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In this activity, learners will predict the size of a giant scale model of a comb or other rectangular object, then make one. If you tripled the size of a dollar bill, could you sit on it?

Music and Sound
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This activity (on page 2 of the PDF under SciGirls Activity: Music and Sound) is a full inquiry investigation into sound frequency.

Treasures in the Rough
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In this archaeology activity, learners make observations and conduct an experiment to demonstrate the effect saltwater has on artifacts.
Double or More
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Choose a recipe to double (or triple, quadruple, or halve). Show everyone the recipe and engage them in figuring out: How much will we need to increase the recipe to feed everyone?

Tree-mendous Plots
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In this math lesson, learners record and graph plant growth and interpret data. Learners plant seeds, and once the seeds sprout, record the change in height of the plants for several days.