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Make a copy of the first stethoscope with only a cardboard tube! René Laennec invented the first stethoscope in 1819 using an actual paper tube!

Extract your DNA from your very own cells! First, learners swish salt water in their mouth to collect cheek cells and spit the water into a glass.

MarsBound! is an engineering simulation activity in which learners use realistic techniques to plan a mission to Mars.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

Learners explore the Bernoulli effect by building an airfoil (airplane wing) and making it fly.

In this activity (on page 2 of PDF), learners create a low-tech refrigerator that requires no electricity to keep food from spoiling.

Learners make a simple battery out of "sandwiches" of aluminum foil, pennies, and a salt water-soaked paper towel.

In this activity, learners explore how infrared technology is used by engineers to create equipment and systems for a variety of industries.

This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.