Glad to see this article, the Bright Star games were pretty solid at combining gameplay and education for the era. Blizzard is definitely the one to play, though it could stand to have a little more visual contrast than its snowy environments allow. The cultural insensitivity thing with Jungle obviously doesn't help its case.
One of the things these particular games do well - which the parent-friendly manual was happy to brag about - was that Yobi's exaggerated animation allows for an early version of video game lip sync with the voiced dialogue. This is important, because you obviously don't want to spell the word on screen in a spelling game (except in the earliest levels), so the kids can watch Yobi's lips to help get the word just a little better... at least until English kicks in with its horrible spelling rules, and all that.
Bright Star also put out a fun little typing tutor called Kid's Typing around the same time. Maybe not the best typing tutor but a far more entertaining one than Mavis Beacon and a far more competent "entertaining typing tutor" than, say, Mario's.