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In this two part activity, learners become draft detectives by constructing their own draft catchers to detect drafts around windows or doors.

In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders.

In this chemistry challenge, learners identify which plants have the enzyme "catalase" that breaks hydrogen peroxide into water and oxygen.

In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain.

Learners are challenged to discover the relative densities of colored liquids to create a rainbow pattern in a test tube.

In this activity learners will plant grass seed and track the growth of the grass over time.

In this activity, learners will experiment with different materials that can melt and change ice.

In this activity learners will build structures out of blocks and then roll balls to try to knock them down.

In this activity, learners will make and launch feather rockets. Lerners will use science process skils such as making predictions and measuring while launching the rockets.

In this activity learners will explore how water moves on waxed paper. Learners will use science process skills such as using tools and making observations as they explore surface tension.

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.

In this activity learners will build a neighborhood out of blocks and cardboard.

In this activity learners will "rescue" animals from tape and then sort the animals. Learners will use science process skills such as categorizing and making observations while they play.

In this activity learners will investigate magnetic and non-magnetic items in a sensory bottle.

In this activity learners will build roller coasters and test them using small balls or marbles.

In this challenge, learners have to figure out in what order to combine five solutions to change the color from clear, to yellow, to blue, and back to clear.

Learners will build and experiment with their own windmills made from simple household materials.

In this chemistry challenge, learners work to figure out which of four juices are real, and which is just food coloring and sugar.

In this activity, learners use gumdrops and toothpicks to model the composition and molecular structure of three greenhouse gases: carbon dioxide (CO2), water vapor (H2O) and methane (CH4).

In this chemistry challenge, learners systematically investigate which combination of four solutions produces a deep red color.