The Tower Bridge Exhibition has teamed up with Guinness World Records to give Londoners the chance to break the world record, and appropriately enough, the record concerns the construction of a Jenga tower.
Specifically, the aspiring architects had to reach 30 levels as fast as they could, and as anyone who has ever played this engaging game will know, even reaching 30 is a challenge in itself.
When the competition started on 22 March, the record was 11 minutes, 55 seconds, and had been set by a team of three children from St. John's Wood in London.
On the first day of the competition, that record was shattered with a 10 minute, 30 second completion.
As if that wasn't enough, while the London SE1 team was visiting the event, a father and son team from east London strolled up and casually blew that record out of the water.
David Dance, 44 and his son Daley, 9 overcame being a bit camera shy to set a new world record, completing their tower in an astonishing 9 minutes, 45 seconds.
The pair were absolutely flabbergasted, and at first they could hardly believe they had done it.
It almost goes without saying that these two Jenga-masters put the London SE1 team's efforts to shame, but we won't mention by how large a margin.
Congratulations to David and Daley, we hope your record stands!
If you are feeling lucky, or are just looking to take part in a moment of modern history, anyone who wishes to compete needs only visit the Tower Bridge Exhibition for a chance to have your name immortalized, at least for a while, in the Guinness Book of World Records.
The Tower Bridge Exhibition opens 9.30am-6pm (last admission at 5pm) until the end of March, and 30 minutes later in April. Tickets are £5.50 for adults, with children's tickets going for £3.