Cadbury's Advent calendar tree

[LittleEsme]

How the frig do you assemble the bloody thing?!

It's only 2 pieces of green card with slits down the middle for frig's sake but we can't see how to assemble the thing (disclaimer, a household of GP's, secondary school teachers all at Masters level and absolutely no common sense between us all).

Help!

After about 20 mins today I figured it out 🤣 one of them have serrated lines on. That then it just slots down the middle. It's the tree part with the longer middle part that you tear the base of the tree and the tip of it. If that helps and makes sense 🤣

Oh god I'm so thick 🤦‍♀️

Thank you!