I knit these for my chemistry professor and his wife who are having a baby. Hopefully they will help the baby learn chemistry from the very begining.
The Chlorine and gold block is my favorite, I really think the duplicate stitch turned out well on that one. They are about four inches tall, so that they're big enough to be safe. I was inspired by a pattern in Knitting to Go, but I definitely didn't follow it since they suggested making a block entirely in ribbing and one entirely in seed stitch, both without letters, which I didn't want to do.