The kindness of strangers: Two helicopter pilots flew down low to wave to my three-year-old son – he was beside himself with joy

<p>My son adores helicopters, so we waved as hard as possible as it flew past. Then it suddenly looped and came back around</p><ul><li><p>Read more in <a href="https://www.theguardian.com/lifeandstyle/series/kindness-of-strangers">the kindness of strangers series&