The most people playing checkers underwater is 88 at an event organised by Normunds Pakulis (Latvia) in Riga, Latvia, on 21 May 2011.
The most people planting seeds simultaneously was achieved by 10,624 participants in an event organised by the Tema Mersin City in stadium of Mersin Tevifk Sirri, Turkey, on 28 April 2009. A logbook was used for the attempt.
The most people planting flower bulbs simultaneously was achieved by 636 participants in an event organised by Rotary International in Great Britain and Ireland (UK), at Butt’s Close Park at Hitchin, UK, on 2 October 2010. The group planted Ruby Giant crocus bulbs.
The most people performing sign language simultaneously to the same song in different locations is 114,277 and was organised by the charity SignHealth (UK) in schools across the UK, on 8 February 2012.
The most people performing sign language simultaneously to the same song is 4,796 and was organised by Zheng Da Zong Yi of CCTV and Zhuhai Campus of Beijing Institute of Technology in Zhuhai City, Guangdong Province, China, on 10 January 2007. Angela Wu adjudicated the event.
The most people performing Shakespeare on a single day is 7,104 schoolchildren as part of the Shakespeare Schools Festival all around the UK on 3 July 2005. Children from schools all round the UK took part playing roles in many of Shakespeare’s best loved plays in theatres around the country. They reckon 92 theatres hosted 368 productions. This was organised in conjunction with the BBC.
The most people performing flag signals is 23,321 and was achieved by the Scout Association of Hong Kong at Hong Kong Stadium in Hong Kong, China, on 21 November 2010. The flag signals performed spelled out “HKS100.”
The record for the most people performing a synchronised swimming routine was achieved by 186 participants at Olympium Pool, Ontario, Canada, on 31 May 2008.
The most people playing dominoes simultaneously is 3,344 in an event organised by Luis Alberto Ramirez Feliz (Dominican Republic) in Santo Domingo, Distrito Nacional, Dominican Republic, on 22 January 2012.
The most people playing hopscotch simultaneously is 359 and was achieved by Round Hills Elementary School (USA), in Williamsport, Pennsylvania, on 20 May 2013.