The experiment was inspired by a similar scheme set up 25 years ago in the US, but this is the first time in the UK that an inter-generational experiment has been established to measure the impact on the health and happiness of older people. As part of the experiment, the older group undergo tests to measure mood and memory. Also, Dr Stewart, a Chartered Physiotherapist, undertakes measurements of their mobility during the time they spend with the young children. The team wanted to find out whether a situation where four-year-olds and 84-year-olds work and play together could improve the health and happiness of the older group to any significant extent.