I’m so excited bout this riddle that I’ve soiled myself

There once was a large prickly fellow, Who stood, arms up, in sand so yellow. 'I hold fresh water within, but protected by my spiney skin. So don't touch me or loudly you'll bellow.'

In a Venn diagram, I connect Avengers and puzzles and IKEA furniture.

Bob is a mail carrier. He wakes up each morning and ANSWER to go to work. At each ANSWER he delivers the ANSWER. At the end of the day, he goes home, eats dinner, and scrubs the ANSWER and pans.

A term for a generation, fitting to explode. If you slang an ‘ANG’ on the end, it’ll come back when it’s thrown. Also a term for a button cap, if you know, you know. Less the last two it’s a noise, after sonic is where it goes.