I've recently had a lot of trouble with getting my five year old to eat enough fruit and veg. After doing a fair bit of research around the best ways to motivate kids to eat more fruit and veg I found that star charts seemed to be quite effective. There's a halloween themed one on a juice site that's free to download and is perfect for getting your kids to counteract all the sweets and naughty
stuff they'll be eating over the next few days. Here's the link http://v8juice.co.uk/images/fruit-and-veg-chart-halloween.pdf