My five year old loves cucumber slices with half a date mushed on top of each one. Sometimes she has cucumber slices with avocado topping or mango topping as well. She's mad about cucumber though.
My kids also love tacos made with cos lettuce and mango/tomato/avo salsa. myabe some basil, pea shoots or spinach mixed into the salsa
mango pudding with chopped banana is also popular