Tinker
Part of speech: noun
Definition: an itinerant tinsmith and mender of household utensils made of tin A member of the travelling community. A gypsy. A mischievous person, especially a playful, impish youngster.
Part of speech: verb
Definition: to fiddle with something in an attempt to fix, mend or improve it, especially in an experimental or unskilled manner to work as a tinker
Example sentence: It's very easy to make insects move. Because they do move mechanically without the rippling of flesh as you mentioned. They move more like real tinker toys and you can make models of them quite easily.
Tinkerer
Part of speech: noun
Definition: Agent noun of tinker; one who tinkers with things.A meddler.