Final part of this documentary series which kicked off last night on Channel 4 that saw 10 four-year-olds share their classroom with 11 pensioners for six weeks in an experiment led by three geriatric specialists. The aim was to see whether being around these little ones had an effect on the health and happiness of the older group. The results are revealed tonight as we find out if the energy and activities of the younger group had a measurable impact on the pensioners and whether this ambitious experiment could transform the way Britain cares for its increasingly older population.