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In this activity, learners build inexpensive pulley assemblies from pulley wheels used for sliding screen door replacement or from clothesline spreaders.

In this activity, learners determine whether thermal energy can be used for work.

In this physics activity, learners construct a small-scale version of a classic carnival game.

In this activity, learners explore physics by building a catapult that launches marshmallows with household objects.

In this activity, learners explore the concept of force and how pulleys are used in everyday life to make work easier.

In this activity, learners are challenged, using everyday objects, to create simple machines to complete specific tasks.

In this activity, learners explore trebuchet design. Teams of learners construct trebuchets from everyday materials.

In this interactive board game, learners "hire" different types of scientists to help canine character Ruff Ruffman solve unusual problems.

In this physics activity, learners experiment with pulleys and find that they can decrease the effort needed when using a pulley to lift or move different loads.

In this activity, learners build their own construction cranes using tongue depressors and pushpins.

In this activity, learners review the history of gumball machines and explore potential and kinetic energy, while working in teams to build a gumball slide.

In this activity, learners explore work, forces, simple machines, and construction. This lesson guide includes simple ways to demonstrate these principles as well as hands-on activities.