First of all, a shout out to all my new blog followers - in fact, to everybody reading right now - Hello! Thank you for visiting my blog! Stay a while, have a cup of tea... okay, I'll have one too, if you insist...
Secondly, regarding the pink/yellow/blue options - I decided. (Hint: see photo.)
Thirdly: What did I learn today?
Only that if you're in a hurry to make 18 snowball blocks, then the quickest way is not to try to be frugal at the same time.
Let me explain. I was scrimping on fabric, so I had the brilliant idea of cutting the 2" squares (for the snowball corners) at 2.5" square instead. Then I could just slice them on the diagonal before sewing them on, and there'd be no waste afterwards.
In theory, it was a great idea. Because 36 two-and-a-half-inch-square blocks uses less fabric than 72 two-inch blocks. But in practice, while being doable, it was far from fast. With squares, you can match up the corners perfectly, and you know exactly where to cut. With triangles, the part you match up has already been cut off, so you have to do some careful measuring, lining up, and sewing.
But I learned all this the hard way, which is probably the best way, as I'm not likely to make the same mistake again.