Arbiter of Wyrms said:
I voted to get rid of the caltrops.
Can somebody please explain the whole "platonic solids" thing?
Behold the Power of Google
Here's the first result.
http://mathworld.wolfram.com/PlatonicSolid.html
In super-duper-short, a platonic solid is a polyhedron whose sides are all regular polygons -- all angles are the same, all lengths are the same.
The d4, d6, d8, d12, and d20 are platonic solids.
The d10 isn't, as neither the polygons' sides nor their angles are regular (you have two kinds of lengths, and three kinds of angles). It's more an elaborate whirligig than a die. (Same comment for many other dice, such as d16, d34, etc. In fact, you could do any kind of die with at least 6 sides this way, including the d6, d8, d12, and d20. Though the more numerous the sides are, the less convenient the die becomes.)
The d30 (not in this poll because it isn't a D&D die) isn't a platonic solid either, for, while all its sides are of equal lengths, it use two different angles.