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Circles or Ovals?
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This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?
Narrow It Down: Asking Yes-No Questions
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In this activity, the learner asks yes-no questions to identify a secret object (similar to Twenty Questions). This game is easy to adapt for different ages and different kinds of contexts.

Blink
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In this self-measuring activity, learners observe and record how many times a minute they blink, take a breath, and chew, as well as how many times a minute their heart beats.

Where the Buffalo Roam
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In this activity, learners explore the Great Plains.

Constellation Viewer
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In this activity, learners will explore what a constellation is and make their own.

Animal Guess Who
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In this game, learners take turns guessing toy animals from around their house based on the toy's characteristics.

Explore Like a Scientist: Fruity Observations
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In this activity, learners use their senses to collect information about a fruit and record their findings in a Science Journal.
Penny Jar: Estimating for Charity
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Learners will collect pennies to donate and will combine charitable giving with estimating and calculating with money. To start choose a charity or something to save up for together.

Crystal Painting
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In this activity, learners will "paint" their own crystal artwork by creating a picture with a super saturated salt solution.

Atoms and Matter (K-2)
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In this activity, learners explore atoms as the smallest building blocks of matter. With adult help, learners start by dividing play dough in half, over and over again.

Fish forms
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In this activity, learners create a three-dimensional sculpture while examining the characteristics of fish.

Why Does Food Spoil?
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In this activity, learners will conduct an experiment to discover methods of reventing foot mold growth on food.

Are Microbes Alive?
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In this activity (on pages 19-21 of the PDF) learners observe mold growing on potatoes. Preparation for this activity has to start a week before, to allow time for the mold to grow on the potatoes.

Chromatography Observations
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In this activity, learners will explore how water affects marker on filter paper. Learners will use science process skills such as making observations and predictions as they explore color.

Marine Skulls Cart
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In this activity, learners look at and touch marine animal skulls to compare them and think about what they eat.

Hieroglyph Holiday
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In this activity about archaeology, learners will explore different Egyptian hieroglyphs and recognize their meanings and uses.
The Right Fit
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In this math activity, learners trace their hands and estimate the number of beans that can fit into their hand tracings. Then, learners glue the beans to the tracing to test out their estimations.

Tactile Double Trouble
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In this activity (11th activity on the page), learners use their sense of touch to identify matching pairs of objects hidden in bags. Learners can also play this game with partners.

Creating a Soil Map
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In this activity, learners investigate soil conditions by creating a soil map. Learners record soil characteristics and compare the conditions of soil in different grid sections.

Clay Bridges
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In this activity, learners make bridges using an oil-based modeling clay (plasticene). The instructions include discussion questions for both before and after bridge building.