Sink or Float Investigation
This simple STEM investigation encourages children to explore the properties of everyday objects through prediction, testing, sorting, and observation. As children compare results and discuss their discoveries, they strengthen early science, math, and problem-solving skills.
Instructions
Gather a collection of safe household objects.
Invite children to predict whether each item will sink or float.
Test each object in water.
Compare predictions with results.
Sort objects into sink and float groups.
Discuss what the objects have in common.
Materials
Large container, tub, or sink
Water
Variety of household objects
Towel
Paper and pencil (optional)
Learning Benefits
prediction skills
scientific inquiry
classification and sorting
observation skills
critical thinking
early math concepts
descriptive language
problem-solving
Infant & Toddler Adaptations
Infant/Toddler Adaptation: Offer a small selection of large, safe objects for exploration. Encourage children to place items in water, observe what happens, and compare objects while modeling simple words such as sink, float, heavy, light, wet, and dry.
