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Size and scale can be difficult concepts to teach. TI staff educator Lori Lambertson talks us through one of her favorite activities, using one of her favorite dolls-Barbie.

Despite my better judgment, I invite TI staff educator Eric Muller to do one more set of activities—several things you can do with soda straws.

It can be hard to make ideas about size and scale relevant to students’ lives. Children’s book author David Schwartz explains a series of neat real-world comparisons from his book that really get the concepts across.

Cheer on the competitors in this zany science cook-off. Teachers compete before a live audience at the Exploratorium for the revered title, "Iron Science Teacher." This week's secret ingredient: batteries.

TI staff educator Eric Muller hits me up for change, and then demonstrates a neat science activity using dry ice.

An introduction to the cuica (pronounced KWEE-kah), a small friction drum used in Brazil's Carnival parade.

A detailed demonstration of how to make this small friction drum, including a discussion of materials needed and how different kinds of materials make for cuicas that produce different sounds.

The science behind this musical instrument, including the concepts of sound, vibration, resonance, and amplification.

An introduction to a crowd-pleasing noisemaker called a sound sandwich, which you can adjust to raise or lower its pitch.

A detailed demonstration of how to make this primitive wind instrument using little more than a straw, two craft sticks, and some rubber bands.