|from Through the Looking Glass (1871) illustrated by John Tenniel|
The nursery rhyme Humpty Dumpty was originally a riddle
Humpty Dumpty sat on a wall,
Humpty Dumpty had a great fall.
All the king's horses and all the king's men
Couldn't put Humpty together again.
The answer is an egg and, for a long time, Humpty Dumpty stood for something that, once broken up, can never be made whole again. Unless that thing was meant to be broken up in order to be put together again – a jigsaw puzzle.
There are a lot of flat (2D) Humpty Dumpty themed jig-saw puzzles but surprisingly, a search for "3D humpty dumpty puzzle" didn't turn up a single actual working example. I had better luck on "egg puzzle":
|from Marcus' Puzzle Games|
|from Puzzling Puzzles of Australia|
|Egg Puzzle Plan from Cornerstone Designs|
Probably the reason why there's not much Humpty Dumpty 3D puzzles is that you need older kids to complete these puzzles – they would just be choking hazards for kids of nursery rhyme age.
This is also why the Puzzle Globe, the only 3D jigsaw puzzle in Ultimate Globes' Classroom Globes collection, is recommended only for kids 8 and up:
This puzzle is solved by putting the curved pieces together again, like thick eggshells
|XXL Childrens Puzzle Globe 8-inch (180 pieces)|
Wikipedia fans had a much smaller globe puzzle at the 2007 Wikimania. This was a 3-inch 3D version of the Wikipedia logo.
There's nothing like a challenging puzzle to help instill those geography lessons. Let the Puzzle Globe put you up to the challenge.