There are better people to give you a critique than me, but I'll do the best I can. There are some good shots there, but you need to work harder to position yourself and time the shots to make clearer, less cluttered photos.
For example in this photo, the reaction of the kid in the plaid shirt is kindof interesting, but the blurry foreground kid on the very right side is blocking part of the serpent machine thingy that I would have wanted to see more of. Also, it's really hard to tell what it is with so little of the machine in the shot.
Also, why include this photo when you have those people in the way in the foreground (and you do have another clearer photo in the set)? If the foreground people were interesting in some way then you could have some argument for keeping it, or if what was happening in the background was SUPER interesting and framed perfectly by the foreground people it could work. But as is we have a meh background with random torsos in the way, in which case I'd rather just see a better view of the vehicle.
Anyhow, you clearly have the basics down, you just need to work harder to get clearer shots.