Bob and the Moon Tree Mystery

When Bob, the Man on the Moon, spots a strange seed bouncing along the surface of the Moon, little does he know that it will grow overnight into the first ever Moontree! Earth tourists (especially the lumberjacks) come to try to get a piece of Moontree, but Bob keeps them at bay (oblivious to the alien assistance he's getting). Only when things start to get really shocking (or should we say shaking?) do we discover the secret of the Moontree - it's seeds are actually eggs, each one containing a baby alien!