Sebastian is – somewhat bafflingly – nearly three. This means that we are testing the waters of such rites of passage as potty training, dummy weaning and sippy cup abandoning (all of which he does much better with at nursery than at home). This weekend, with meals, Sebastian has had a regular beaker cup rather than a sippy. And he’s done brilliantly – no spills! – apart from the fact he seems to want to use his beakers as shoes once they are empty. Hardly the last word in sartorial elegance or good table manners. But Sebastian is an innovator, who are we to argue?