Bedlam cube

[1][2] The puzzle consists of thirteen polycubic pieces: twelve pentacubes and one tetracube.

Two of the BBC's 'Dragons' from Dragons' Den, Rachel Elnaugh and Theo Paphitis, were to invest in the Bedlam cube during the 2005 series.

Danny Bamping (the entrepreneur behind Bedlam cube) finally chose a bank loan instead of their investment, as seen in the relevant "Where Are They Now" episode of Dragons' Den.

[3] According to Guinness World Records, the official world record for assembling the Bedlam Cube is 11.03 seconds by Danny Bamping on 9 November 2006.

[4] The blindfolded record is 27.21 seconds by Aleksandr Iljasov on 25 February 2008.