Ta-daaah, here it is officially: Jon’s Hallowe’en 2011 costume!
The Tyrannosaurus rex was, like all of Jon’s previous costumes, picked by him alone. He was very clear that he wanted a “realistic” T. rex dinosaur, and not the character Rex from Toy Story (even though he had been bubbling over with delight for weeks over the Toy Story 3 Blu-ray disk he got for his birthday.)
The blue thing is Jon’s hallowe’en candy sack; not part of the costume.
Note that the T. rex‘s legs moved with the wheels—a cunning bit of engineering by Peter, but alas, prone to breakage.
Note the teeny-weeny arms.
And the nasty, yucky teeth. Ewwwww, gingivitis!
Okay, not a great pic of Jon, but a nice front view of the costume!