I am 73 and now it is school holidays I am on the rota for looking after grandchildren. During term time I collect from 3 different schools 3 afternoons a week and cook tea for them all on Mondays. This week I have between 2-4 grandchildren for 4 days this week. On Monday I took 2 to a wildlife centre, today it is 3 to the cinema, tomorrow, 1 to the cinema and Saturday, 2 to soft play. Even days spent indoors are a constant stream of getting drinks, wiping bottoms, cooking meals, clearing up glue and glitter and tidying up. It's exhausting so I can fully understand why you needed to sit down for a while and I hope you told his parents that. I love my grandchildren and enjoy my time with them but I am getting older but that isn't taken into consideration.