I'm seeing the fact that since there is snow biomes in Minecraft and the fact that there is also lots of area of frozen lakes/ponds...Why not create a pair of skates using 4 pieces of leather, 2 pieces of string and 3 iron or gold ingots as the metal part of the skates? Then skating in Minecraft would be fun to compete if you were to race or play some ice-hockey. This is what it would look like: http://minecraftrecipedesigner.com/creations/139975.png
And yes, I do think that's an interesting creation, but not all that useful.
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I guess it's not that useful but it sure as heck useful to quickly get around somewhere.
I guess i can make it into a mod but the problem is...I don't really know how to make a mod for that matter...