Interesting choice of subject. The background is distractingly cluttered and the bright white draws the eye away. Seems like you could have set this up better.
An interesting idea, but the squash bottle on the right distracts. I think for a child's perspective to get the most impact you would be better taking an object we adults usually see square on and then shoot it from the ground upwards.
This would have been more effective if 1.) It was more clear what this thing is, and 2.) if it had been positioned in front of a less distracting background. My eye keeps wondering to whatever that green thing with the "G" on it is.
Without the title it doesn't reveal anything about proportion. The title should not be doing the work of the photo.