We planted "magic trees" on 10 October 2006. After putting together the pieces of cardboard, we poured in a sachet of clear liquid at the base of the trees. After about 6 hours, the trees were fully grown.
[Magic Trees: Out from the box]
[In the beginning: Nothing on the trees]
[After about half-an-hour: "Leaves" started to grow]
[After a few hours: The trees are fully grown]
Apparently, there're some chemicals on the cardboard and in the clear liquid provided. The "leaves" are some form of crystals.