Original piece of the thumbnail puzzle from Stand-up Maths video "Why don't Jigsaw Puzzles have the correct number of pieces?" https://youtu.be/vXWvptwoCl8
Use discount code "JIGGIVES" and you can get one of these for free with any order. We had to give them a nominal price so you're welcome to pay £204 for one, but using the code will reduce that to £0 as long as you're buying something else.
Only 204 of them available because that's how big the puzzle was. Maximum of one per customer and no funny business or trying to game the system. Like a good jigsaw we all need to work together here.