Parcel Puzzle Solver T-Shirts

'With your regular carrier overdue you'll have to use me.'

'You may now turn over your paper and begin.' - 'Sir!' - 'Yes?' - 'What is it?' - 'I think Train 'A' and Train 'B' might be going to crash!'

"Together ideas for couples" "Slap a sandwich together" "Put two and two together" "Pull themselves together" "Rub two sticks together" "Try to hold it together" "String a phrase together"

"I've always dreamed of being on an academic team like this! It's great that we can all depend on each other!"

"No, I didn't steal your content. I just have your content's doppleganger."

Typical Brain Versus Einstein's Brain

'Is the glass half full, Wally, or half empty?' - 'Oh, oh! Trick question!'

"Liable to flooding? Whatever gives you that idea sir?"

The Map of the human brain

'X is unknown? Even to somebody with all your education?'

Peephole in a pile of presents (colour).

Girl does mathematical equation. Man says 'Tut! Teenagers today and their problems ...'

'Uhhh... Houston, we have a problem.'

'According to creation mathematicians, all of Euclid's theories were originally found etched into rocks.'

'You know too much!'

Eureka!

Extinction of the dinosaurs fully explained

A Major Refresher Course is in Order.

"What the...They wrapped me in toilet paper!"

'Amscray,fuzzbrain - no carnivores allowed

'Recalculating...recalculating...'

The Salmon Run

Introducing...Anagraman.

Archimedes helps Sisyphus

Some card-game puns

"Wait—what did I come into this room to do?"

'I love cutting trees in perfect circles because it drives aerial photography interpreters crazy.'

"Do we really need to chase the rabbit down into its warren Dad? It's a maze and it's dark down there..."

"What does it mean? Heck, I don't know! It's mystifying!"

'He's not supposed to go out.'

"Boy, that's what I call a maze."

Wordplay: Gastropod.