The student was tasked with constructing 3D shapes out of marshmallows and toothpicks based on clues about the number of faces, edges, and vertices. They built octagonal prisms, hexagonal pyramids, pentagonal pyramids, pentagonal prisms, cubes, and square pyramids. While it was fun, it was challenging not to eat the marshmallows. The student learned about 3D shapes and their names, and wants to learn how to make more complex shapes and find more examples in the real world.

1. 3D Construction Challenge
My task was to make the 3D shapes by using the marshmallow and toothpicks. I got clues about what
you need to make and when you finish you also need to write how many faces, vertices and edges.
I used toothpicks to represent edges and marshmallows to represent vertices.
Based on the clues given, I solved the problems by creating the following models:
Octagonal prism, which had 10 faces, 24 edges and 16 vertices
Hexagonal pyramid, which had 7 faces, 12 edges and 7 vertices
Pentagonal pyramid which had 6 faces, 10 edges and 6 vertices
Pentagonal prism which had 7 faces, 15 edges and 10 vertices
Cube which had 6 faces, 10 edges and 8 vertices
Square pyramid which had 5 faces, 8 edges and 5 vertices
It was fun to make the 3D marshmallow shape because it looked yummy. It was challenging to not eat
marshmallow because we put on the desk so it was dirty. This task made me think about the shapes
and how to make to something look beautiful.
During this task, I learned more about 3D shape and how to say the new shape’s names such as
octagonal prism.
I still have questions about how to make shapes with more edges, vertices and faces? Next, I would
like to investigate and find more 3D shapes in the world.