The Balled Boy

A world has ben covered by a gas that will kill anyone older than 28.
A greedy king found the cure but never shared it.
The king found a material that will give enough nutrients wen eaten, is see-through, a solid, but it can't be bent or stretched out at all.
The king found a way to heal any wound, he also created a device that can shrink people.
The main character was bullied and still has trauma of things like it.
The trauma is mostly of explosions.
Sum trauma from other things that will appear later.

Sorry if anything looks like it is from someone else's story I will either change it or get arid of that part but I need to know about what it is and where it is.