Clear instructions and illustrations. These were the first things I made after learning to crochet which shows that the instructions are easy to follow. I got a bit addicted - you just want to try all 100! Most of the snowflakes take 15-20 mins to make so it's quite easy to knock up a little collection of them for Xmas presents etc. It is essential to stiffen and block them - some which didn't look very promising when finished were beautiful once blocked. I found it worked well to stiffen them in a mixture of 1 third PVA glue, 1 third glitter glue, 1 third water. Put the mixture in a freezer bag and squish the snowflakes around in it before squeezing them out and blocking.