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Science both 3–5 years

Sink or Float

20 min
small_group
sensorial_activity
OrderLanguageRefinement of Senses

Overview

The child explores the concept of buoyancy by predicting and testing whether various objects sink or float in water. This hands-on experiment introduces the scientific method at a foundational level — observe, predict, test, and classify.

Objectives

What the child gains from this work

Understand that some objects float and others sink in water. Practice making predictions (hypotheses) before testing. Classify objects into two categories based on observed results. Develop vocabulary: sink, float, heavy, light, dense, buoyant. Experience the basic steps of scientific inquiry.

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