Hi, while they're not traditional bonsai, everyone usually has tried one (and lots succeed). In the first picture, you might want to just cut out some of the trunks and let energy be concentrated in fewer (of an uneven number - more interesting that way). The one growing between two other trunks is kinda weird, though it's your tree of course. You could try getting both plants to put out less leggy growth by providing a ton of high light all day long, just a few inches from their tops (T5 fluorescents make good ones). And the bottom tree could use a haircut (again, your choice of course). What you want to do (don't you?) is grow them in wide, if not deep containers now, to fatten the trunks as much as possible - not something that'll happen soon in a little bonsai pot. Also make sure drainage is very fast and watering infrequent at best.

The ones from Hawaii are dwarf scheffelaria. Fuku bonsai
is the source On the big Island in Curtistown.

Penny