There can be little that defines childhood as much a climbing trees. Aside from being the lungs of the planet, a source of fire and a quite promising building material, it is clear the the prime function of trees is to be an adventure playground for kids.
Lucy scales this leviathan like a rat up a drain pipe.
It is only then that Lucy realises that climbing down trees can be a bit harder than climbing up them.
But after a little practice her confidence grows and she is like the new Tarzan
"Can I build a tree house Dad?"