Nothing we do in life, including gardening, is done completely alone and without influences. This is particularly true if one has imaginative children.
You'll note that the ginkgo has two trunks. It's had a tough life, okay? I don't want to deny it any sort of happiness. It was never the hardiest specimen (the sort of potted sapling you don't buy unless you are determined to acquire that particular species) and it suffered in several summers of drought after planting, eventually losing the growing tip. Then a tree fell on it (that was Hurricane Isabel's fault). I was sure it was a goner until we pulled the branches away and found it was basically undamaged.
After that (the shock, I'm sure) it did settle in and start to grow, in the more shrubby form you see now. If I was a good arborist, I'm sure I would have eliminated one of those trunks, since eventually it'll turn into the sort of tree that splits down the middle, but I hate to discourage its second wind. I'm tempted to leave those branches coming out of the base, too, but I'll probably prune them off.
(That's the shell of a pumpkin; the insides had already been scooped out for cooking.)