Thank you for your comment, sorry I didn't see it until now. I used to work at a summer camp in the US where all the children would camp back with beige filled plates. I made a game out of counting the colours on everyone on my table's plates. I found it was much more effective than taking to them about healthy eating, the only way they could win the colour count was by stocking up from the salad bar, they were trying veg they had never tried before. :)