The Jello castle was a massive jelly gift that Flint made in honor of his meeting of Sam Sparks.
Replicas of sculptures of famous peoples had Sam's face on every single one. The inside was carved out as a bounce-able fun house.
- Anyone was able to shift through the Jello, allowing Sam and Flint to just go inside without any doors
- The Jello castle is another nod to the book, where a giant Jello mold was seen rounding out a Dinner.