The key is to find something that interests the chicks and then arrange things so they have to interact with you to get it. It might be chewing on a piece of millet spray that you're holding in your hand, or some type of interesting toy or shreddable object. Fledglings do like to fly though so expect a lot of that - a lot of times they'd rather fly than eat!

When they start flying they are not interested in anything else!

The babies are doing much better. The oldest flew to my shoulder for the first time.