Dragon fruit was sold in Hawaii. Quite delicious. My mother-in-law had a lychee tree, so my daughter as a young child would enjoy these. I do wish to get a avocado tree in my next house but l have to special order it.
You can easily grow an avocado tree from a seed. Just buy an avocado at the store, remove the seed, put it in a container or jar of water so only the bottom half of the seed is submerged, put it somewhere out of direct sunlight and wait. The root will start growing, the seed will split in two, and the trunk will start growing out. I've also rooted avocado seeds in damp soil without first putting it in water. In fact, avocados grow voluntarily in my compost pile every summer from the seeds taking root there.