Providing three-year-olds with access to water or sand tables with a variety of containers best promotes exploration of which physical science concept?

• A. Properties of materials
• B. States of matter
• C. Force and motion
• D. Sound and light

Answer: (A)

Materials have observable properties that you can compare and describe. When three-year-olds have water or sand tables with a variety of containers, they’re directly exploring how different materials behave under different conditions. They notice what happens when they pour, fill, and scoop—how water flows to fit the shape of a container, how sand can be packed or spread, and how containers change what the material looks like or how much it can hold. These experiences help children describe properties such as texture (wet vs dry, smooth vs gritty), flow and volume (how much fits in a given container), and how materials respond to containment. Through predicting, testing, and talking about what they observe, they build early reasoning about the characteristics of materials and how those characteristics influence how we use them. While you might glimpse state differences (solid vs liquid) or movement in other contexts, the core learning here centers on noticing and comparing material properties through hands-on play with containers.