Your generally not going to get a baby eager to eat veggies.

Once my beardie started putting on some decent size I started leaving veggies in his cage and he eventually got the point.

I would say feed as many crickets as he will eat.

http://beautifuldragons.503xtreme.com/Nutrition.html

Great food chart.

Collards, Mustard, Turnips are great as they are high in calcium.

Check that around that website as well she really has some great stuff and it helped me when I first got my beardie.

Mike