I'm sorry, I'm not sure what you mean by "911 pod s." Could you please provide more context or clarify your question?
As for the second question, the revised sentence with correct punctuation is:
Like the platypus, the echidna lays grape-sized eggs that hatch into babies the size of jellybeans, which grow in the mother's pouch.
The commas are added to set off the introductory phrase "Like the platypus" and the relative clause "which grow in the mother's pouch."