Offering healthy foods that have more flavour complexity, such as a fruit salad (instead of a wholefruit) can increase consumption due to both variety and convenience.
Stick to foods closest to their natural state like vegetables, nuts, lean protein, wholefruit, plain low-fat dairy, whole grains like barley, brown rice and quinoa, and healthy oils.
Sometimes, I remember my cousins tried to be brave enough to put the wholefruit in their mouth, and they did it and splashed all the juices around and it was just a good way to entertain ourselves.