I hope this wasn't posted before that I didn't see...and I'm sure some of you do it already, but there have been quite a few posts on this subject. So here it is...
When you give your beardies baths, drop in whatever you want them to start eating. When they walk towards it to check it out, or even swim by, it moves and catches their attention. And as they move closer, it moves farther away until they finally catching it. So since they're attracted to movement, they eat it and find out they like it, so they go straight to their bowl now when I put their veggies and pellets in. This is also good for those that don't like water...when they see their favorite veggie moving away from them, they go into the water and getit, finding out it's not so bad.
Or if they have places to climb, roll whatever they're trying to get off where they're sitting so they run after it and capture it.
Good Luck and I hope this works for you. And don't yell at me if it's already done!!! 
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~Julie~
