Lego Christmas Tree: Design As previously mentioned, the design of the tree features multiple layers stacked on top of one another. Each has four ‘branches’, with a decoration placed at the end.

UX designer Bruno Porrio explains that "after multiple rounds of iteration and validation, we landed on the finalized design of the skill tree (which we can’t wait to show you).

Undergrove is a board game about the mycorrhizal relationships between fungi and trees. The co-designer is Elizabeth Hargrave, who also created Wingspan about birds.