I have nothing but respect for any LEGO builder who participates in any Iron Builder challenge, the fan-driven challenge where a single seed piece is used in inspiring ways.  The latest example is this build by -LittleJohn, where the seed part is the wind-up key in dark orange. Not only does it work perfectly as the wobbly bits along the seahorse’s back, but it also makes up the long kelp strings, held together by Minifig hands.