Nicely done. The idea, the setup...
My only remark is on the lighting and the shadows. That yellowish cast really bothers me. I hints on a missed WB, but the white surfaces suggest that the WB is OK. A complete mindf*ck :-)
Great imagination on this, I like the shot and the idea, the only thing I would change is capturing more of the idea of "play". Maybe a small hand pushing the tank? Well done.