If a strawberry cake inequally cut facilitates a duck with a bow-tie
If a polyhedron is part of a ringed planet
If some spaceships contain an Escher figure
And if a blue juicer relies heavily on six pointless dice
What is an evading slinky relative to all of these things?
Didn't figure every line of the riddle out, but With invaluable help from @Phylyp and @gnovice, the clues are now worked out, and
I'm confident the evading slinky is something of a
to all the things.
That would be because each line describes
relations of SE sites, identified as their logoes.
* aviation (cake cut inequally, thanks @Phylyp) facilitates travel (duck with a bow tie @gnovice got this too)
* rpg (polyhedron) is part worldbuilding (ringed planet)
* physics (blue juicer, thanks, @gnovice) relies heavily on maths (six pointless dice)
* gaming (some spaceships, for very small values of "some") contains puzzling (escher figure)
And therefore, the evading slinky is definitely
the logo of Stack Overflow, the Firstest and Bestest of all the sites.