This is an ideal subject for the primary color challenge. I would personally have used a different background to enhance the transporter, maybe something without texture. Somehow the bricks are a little distracting. Good luck anyway.
This seems a little blurry and the yellow is a tad blown out on the corner. The background here distracts from the smooth lines and soft feel of this kids' toy.
All the colours here but a different background would look better and out of focus on toy. The border is not to attractive maybe a 10 pixel plain black border would score higher. Apart from that its fine but keep trying.
a little soft in focus and i think a plainer background would have helped out as well. i think the cropping and perspective could have been less tight which would have allowed the object to add more as the current photo doesn't allow us all to fully identify what it is.