Marshmallow toothpick structures

Hamish will be 4 in September and we have recently started to introduce more STEM activities into our curriculum.

So, the other night when he asked for something fun to do, I brought out some marshmallows and toothpicks and we spent the time learning to construct 3D shapes.

To do this activity you will need:

  • Toothpicks
  • Marshmallows

( marshmallows can be substituted for grapes, berries, soft sweets or even playdough)


First we grabbed our supplies and discussed the shapes we could make.

Next I spoke Hamish through constructing basic 3D shapes – a square and a triangle.

Then I left him, with his knew found knowledge and skills to construct his own sculpture.

I was impressed to find that he had built a little house. This is an activity that encourages creativity and problem solving.


We used ordinary sharp toothpicks bit it may be advisable to use flat toothpicks for younger kids.

Coloured toothpicks could also be fun.

You can add depth and size to this project by supplying a variety of marshmallow sizes and both toothpicks and kebab sticks.

You can challenge your child by giving them various items to construct, ie: a bridge, a house, a boat, ect

This activity is adaptable for all ages and you may find a younger child would rather construct a flat 2D shape, rather than a 3D shape.

This is a fantastic affordable way to introduce geometry and shapes to your children.

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