Yes, mine love to eat apples. They also like practically any variety of lettuce. Fish flakes are always appreciated, but I only feed them a couple times a month. Mostly I give them slices of carrot and apple.
They're pretty shy, but I only have 3. They always come out at night! Has taken a long time for them to mature--between 6-10 months. I think they grew a little more quickly in the summer time when the house regularly got up to 76F.