Response from LEGO SHOP
12 September 2017
Jordan, Consumer Services
It is great to hear how your son plays with his LEGO sets. I hope that I can provide a bit of assistance in enjoying this set a bit more.
Based on your description I believe your airplane is built incorrectly or perhaps not all of the piece have been put back on after a few of its falls. When built correctly you can actually hold the plane by its wing and shake it pretty hard without any issues.
With this being a small set, I would recommend rebuilding this set with your son and seeing if it can hold up to his play a little bit better.