My local healthy grocer (for lack of a better name) has "potato" chips made with veggie based ingredients like lentil flour, garbanzo bean flour, etc. Same is true for pasta.
Also, from personal experience, get one of those rubber horse heads and make up an alter ego that talks about how much they looooove veggies and how carrots are their favorite food. You can have a friend or family member do it, but if "Veggie Vincent the Healthy Horse" shows up enough times and talks about all the healthy, delicious things we can eat to grow big and strong like him, it's a step in the right direction, not to mention fun for everyone involved. :D