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This activity is on page 3 (continued on page 2) of the pdf, part of the Simple Machines Discovery Box. In this fun activity, learners "create" a complex machine by simulating the parts in action.

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

In this chemistry activity, learners fill two test tubes with a solution of "artificial stomach fluid," consisting of hydrochloric acid in the same concentration as in human stomachs, some soap to cre

This is an activity about dinosaurs, fossils, and the work of paleontologists. Learners use hand tools (paint brushes, scoops, and sifters) to unearth fossil specimens in tubs of birdseed.

In this chemistry demonstration, acid rain is simulated in a petri dish.

In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this activity (on page 2), one person "programs" the other like a robot to move through a space, trying to get them to avoid obstacles and reach a goal.

In this activity, early learners simulate fossil prints in play dough or clay.

This game plays a dozen different sounds, altered to simulate what they would sound like if you had hearing loss.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.

Learners will explore the scientific mystery behind a disappearing group of trees by examining data and attempting to explain the decline.