Lucas loves to...do ANYTHING Tyson is doing. He has to be right there in the middle of the action. (He later tried to climb up the slide from both directions when one wasn't working for him, he tried the other slide).
Here's Luke's "determination look", he sticks out his lower lip and goes fore it! I can't believe he has such dark eyes when Ty's are so blue. Before Luke came along, I wasn't a big fan of dark eyes, but his are just so gorgeous, you can't help but love them!!!