posted 3 years ago
If they are some kind of ornamental cucurbit, AND if you like to save your seeds from year to year, I would be cautious and find out their exact species before growing them. If they are the same species as something you like to save seeds of and grow for food, they could easily cross and make your next batch of seeds grow out into something inedible.
Or, if you have enough seeds saved from all your cucurbits for the next year or two, you could try growing them next year for fun and curiosity, but don't save any seeds of edible cucurbits next year. The following year, plant only your older safe seeds for edible vegetables.
They are definitely not rambutans, which are tree fruits.
Works at a residential alternative high school in the Himalayas SECMOL.org . "Back home" is Cape Cod, E Coast USA.