Hankerchief Tree... Maniltoa .... Maniltoa lenticellata is a flowering tropical tree in the Fabaceae family. It is native to tropical semi-deciduous rainforest and gallery forests in northern Queensland, some of the Torres Strait Islands, and New Guinea. Common names include: Silk Handkerchief Tree, Cascading Bean, Native Handkerchief Tree.
This is Birambi (another relative of the Carambola). This one is acidic beyond words. Eat in chutneys or pickled. Or fresh with salt.
You can grow an olive tree in a concrete planter on a deck. They're really hardy, don't mind heat generated by their pot and don't require insects to pollinate them. I've had one for 16 years in a terracotta pot and although the pot keeps it small, it still rewards me with enough olives to brine for my pantry.
Grow an Avocado Tree from the pit (for a houseplant, it probably won't produce fruit). After drying, the pit is suspended in a glass of water and once there is root growth of about 2″, it can be planted in a pot of soil and tended to as a houseplant. If your climate allows, you can plant this outdoors.