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In this activity about encryption, learners cut out a secret decoder badge from a handout and use it to encode messages to each other.

Play-Doh is conductive! Use the semiconductive qualities of Play-Doh to make your own squeezable instrument. Pico Cricket is required.

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

In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.

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

In this activity, learners explore how musical instruments are engineered.

In this drawing/mapping activity, learners design plots of land while incorporating positive strategies for improving water quality.

Learners conduct two activities to investigate two properties of liquids: density and viscosity. In a clear container, learners stack 7 different liquids which will layer according to their density.

In this activity, learners design and build a simple wind vane —one of the oldest kinds of weather tools— and use it to show wind direction.

In this hands-on science experiment, students combine their understanding of the different states of matter and the characteristics of various chemical reactions.

Build a musical ice theremin by programming a micro controller, like a Pico Cricket to respond to resistance generated by the ice melting, or the ice being touched.

In this delicious activity, learners get to make, taste-test and compare their own "brands" of homemade strawberry ice cream.

This activity is a hit for family events and all ages—some will finish in 45 minutes; others can go on for hours.

In this activity, learners construct a device that allows them to view 2-D images in 3-D.

In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.

In this archaeology activity, learners consider ways in which excavating an underwater site is different from excavating a terrestrial site.

Learners create an Incan counting device called a quipu (pronounced kee-poo).

In this activity, learners make or use pre-made clay beams to scale and proportion. Specifically, they discover that when you scale up proportionally (i.e.

In this three/four-day lesson, learners calculate perimeters and areas and draw the castle plan to scale.

This is a perfect summertime lunch activity! Pico Cricket is required (micro controller). First, get a bunch of cut up fruit, line them up, then plug a piece of fruit with a Pico Cricket sensor clip.