Well done Leah, I think it was a very nice picture. Don't let the 100th place it stop you from making more pictures. Keep learning from your dad and I'm sure you will end up first in the list someday.
This may have worked better if the gian were wearing long pants and if you could have gotten even lighting. It's tough to take a good flash shot of a subject that's receding from view.
the angle on this seems like it either needs to be more extreme, or non-existent (not up and down, but the side to side -- how one shoulder is closer than the other). Because of the flash, it seems like his face is a tad underexposed, and you can't see his eyes because of the flash reflection in his glasses
The way he's looking down at me gives the impression that he's too tall to actually stand up straight - nice! Good focus. Shame about the cut-off elbow to the left.
I like. You can tell by the size of his arms and thighs that he isn't a giant. But the angle and low ceiling makes him a tad intimidating. Is your white balance a little off? With a little better lighting I think (not sure) that you could avoid the heavy shadow behind him and the "flash" on his glasses. Good job. It isn't perfect but it is neat.