If you want evidence of a 2012 legacy, the Europa Centre in Crayford, Kent, is it.
The gymnastics club had outgrown its previous centre but was struggling to get funding for a new building.
Legacy bosses gave the team £1.2m which helped make their dreams a reality.
The centre is now used by thousands of young people every week and has many more on its waiting list.
This club is undoubtedly a success, but not all legacy promises have been delivered.
The slogan for the Olympics was 'to inspire a generation' and to get more people playing sport, but that has not happened.
There was a jump in participation after London won the bid to host the Games (from 35% to 38% of adults in London playing sport at least once a week) but it has not increased since 2012.
London Sport have been tasked with getting a million more Londoners playing sport by 2012.
Basketball is a sport which has, unlike gymnastics, lost out.
Its 2012 venue, the Basketball Arena, was only temporary, the sport has faced funding cuts and Britain has not qualified for Rio.
There are more than 500 courts in London but nearly all of them are multi-use like the Copper Box Arena in the Queen Elizabeth Olympic Park which will host EuroBasket 2017 men's qualifiers in September 2016.
Legacy bosses have succeeded in ensuring the Olympic Stadium has not become a 'white elephant.'
It hosted Rugby 2015 World Cup matches, is about to host the London Anniversary Games and will be West Ham United's new home from next month.
The London Legacy Development Corporation is responsible for the physical legacy of the Park.
In total 11 million people have visited the Park since 2012, even though some of it is still a building site.