So try asking your sons to pick out some fruit and vegetables in the supermarket. Children also love colour, so appeal to this sense by introducing them to multicoloured vegetable varieties (but per- haps don' t catagorise them as such, just call them by their individual names) - red beetroot, orange sweet potatoes and squash, yellow peppers and courgettes, pink and green chard, white and lime-green chicory. Show them that vegetables mean more than boiled peas.