Based on a recent postage on the mother of all cartoon blogs (JohnKStuff), I've learned that Johnny Hart's sketchy but humorous caveman makes for a test in cartoon construction.
This is the original:
And here's my first pass at mimicing his material:
Second pass...And third pass... Granted, the one big problem area is those pesky, dirty feet...eewww. But I think that the third image comes closest to looking like the original.
The trick in construction here appears to be in spacing, angles, and in volumes. It's all about the circles.
How would you construct a pair of legs like these?