Describing Objects: A Sorting & Properties Experiment at Home

This experiment pairs with the Describing Objects lesson. Your child will practice describing, comparing, and sorting objects by their properties — the same skills scientists use to classify everything from rocks to stars.

What you need

• 15–20 small household objects (buttons, coins, crayons, pasta shapes, toy figures, spoons, erasers, paper clips, keys, etc.)
• A kitchen scale or balance (optional but fun)
• A ruler or measuring tape
• Index cards or sticky notes for labels
• A large tray or table space for sorting

The experiment

Round 1: Free sort

Dump all the objects on the tray. Ask your child: Can you sort these into groups? Do not tell them how — let them choose their own rule. When they finish, ask them to explain their grouping. Write down their sorting rule.

Round 2: Sort by color

Now ask them to re-sort by color. Are the groups the same size? Which color has the most objects?

Round 3: Sort by size

Line up objects smallest to largest. Which was hardest to place? Were any objects the same size but different in other ways?

Round 4: Sort by texture

Create three piles: smooth, rough, and in-between. Let your child feel each object carefully. Do any objects surprise them?

Round 5: Sort by weight

If you have a scale, let your child weigh each object. If not, have them hold one object in each hand and compare. Can they put all 15–20 objects in order from lightest to heaviest?

Challenge: Two properties at once

Can your child find all the objects that are both small and smooth? What about heavy and rough? This introduces the idea of sorting by more than one property at a time.

Discussion questions

1. When you sorted by your own rule, what did you choose? Why?
2. Did any object fit into more than one group? What did you do with it?
3. Scientists classify things into groups to understand them better. Which property was the most useful for telling objects apart?
4. If a friend had to find one specific object from your pile, what three properties would you describe to help them?

What they are learning

This activity reinforces the Describing Objects lesson: objects have properties like color, shape, size, texture, and weight, and we can use these properties to sort, compare, and describe them. Classification is one of the most fundamental skills in science.