THAT'S where he left the clues for the new element?!
The weakest part of the story for me was Tony dealing with his daddy issues and how he solved the palladium problem.
His father hid the clues to the new element encoded in the layout of his Wallyworld park? That's a bit subtle, don't ya think? Not to mention daddy yells at little Tony for touching the model, so he'll be traumatized enough to avoid the dang thing for the rest of his life.
How about leaving a BIG hint in the films? "Hey Tony! Check out the structure of this building for a clue to creating a new element that wont kill ya!"
You're forgetting one thing- I just started using laser cats again!