This shape sorting activity is a fun introductory geometry lesson for preschoolers and toddlers. It helps kids understand the difference between 3-dimensional and 2-dimensional shapes.
This 3D shape sorting activity is based on a similar Montessori shape sorting activity using Geometric Solids which matches 3D solids to the corresponding 2D shape.
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Materials Needed
Blocks in various shapes. You'll want cubes, prisms, cones, rectangular solids, cylinders, etc. I love these plain geometric blocks.
Large piece of white paper. You know I love our roll of butcher paper and use it for all kinds of activities at home!
Marker or crayon.
Set-up
Place the paper on a table or floor. Using your marker, divide it into four sections. In each section draw the following 2-dimensional shape (one in each section): square, rectangle, circle, triangle.
MORE: Best Sorting Activities for Preschoolers and Toddlers
In the image below, you can see a green shape in the corner of each section.
Instructions
Show your child how the base of a solid matches up to the 2D shape in each section of the paper.
Show them how to sort the 3D shapes to the corresponding 2D shapes.
It's as simple as that! If you like, follow up with questions like, "How did you decide where the pyramid went?" Or, "Was there any shape you had trouble with?" "Why did you decide the cone went next to the circle instead of the triangle?"
The best part of this activity is that is usually ends up in a lot of free block play at the finish!
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Idea first published 5/1/09, updated 2022,
Raising a Happy Child says
I think in our house it would go directly to free block play, and all blocks would end up as furniture and street signs.
Jackie H. says
Wow. I tried this and it challenged my child a lot more than I thought it would. It was a great activity. Thanks for sharing!
Mom and Kiddo says
Jackie, I love it when people let me know they've tried one of the activities! I'm so glad to hear that is was a success.