木材

木 = 八 + 十 : Mnemonic symbol: a Christmas tree.

Malte Monkey (mu) is setting up a Christmas tree (木) in the bathroom of the space station (Ø4). He decorates the tree with eight-balls (八) and puts a holy cross (十) at the top of the tree.

材 = 才 + 木 : In the airplane's kitchen (ai2) , the King of Chu (c) investigates a Christmas tree (木) with his secret X-ray vision talent (才). He can see that the material (材) the tree is made out of is not timber (材); instead, he sees that the tree has been 3D printed.