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Build a TetraTREEdron

Calling all families, communities and schools! We want you to build a tree, with a mathematical twist! Discover how to build a tetrahedron from a net, then join 4 (or more!) tetrahedrons to make a Sierpinski tetrahedron. We call these TetraTREEdrons!

Materials you will need

  • Tetrahedron Template (available to download below)
  • Plain paper, pencil and ruler
  • Scissors
  • Glue
  • Colouring pens, pencils or crayons
  • Sellotape
  • Further crafty decoration items (optional)

A simple alternative

You don’t have to make a TetraTREEdron. Why not turn a single tetrahedron into a simple hanging festive decoration?

Win a pack of Number Rumbler!

Upload a picture of your finished Sierpinski tree to social media by 31st December 2021 tagging us @mathsontoast and you could win a pack of our brain-fizzing family maths card game Number Rumbler! There are 50 packs up for grabs!

Download the tetrahedron template

Tetrahedron Template

Find out how to take part in our 2021 Festive TetraTREEdron Project

2021 Festive TetraTREEdron Project Activity Sheet

Display a poster to encourage your community to get involved in the project!

Build a TetraTREEdron poster

Submit your TetraTREEdron to our online gallery


Watch! How to...Make a TetraTREEdron