tiddler(n = noun.person) child, fry, kid, minor, nestling, nipper, shaver, small fry, tike, tyke, youngster - a young person of either sex; "she writes books for children"; "they're just kids"; "`tiddler' is a British term for youngster"
is a kind of juvenile, juvenile person
has parts: child's body
has particulars: bairn, buster, changeling, child prodigy, infant prodigy, wonder child, foster-child, foster child, fosterling, imp, monkey, rapscallion, rascal, scalawag, scallywag, scamp, kiddy, orphan, peanut, picaninny, piccaninny, pickaninny, poster child, kindergartener, kindergartner, preschooler, silly, sprog, bambino, toddler, tot, yearling, urchin, street child, waif

tiddler, n. Brit. colloq.
1 a small fish, esp. a stickleback or minnow.
2 an unusually small thing or person.

Etymology:
perh. rel. to TIDDLY(2) and tittlebat, a childish form of stickleback