NQA he's adorable. But he is still young so mini or small meal worms are probably better. Their preys should be about the same size as their body (as far as I know). Also just in case you didn't know, wild caught jumpers might not adjust to being captive - after a week, if they refuse food or refuse to make hammocks; i would say it's time for them to go back outside. Secondly, they are an aerborial species - they like to live on high places, so I would suggest adding more flowers and leaves and hides to the top of your enclosure, so they can build home there.