One of my favorite attempts at brand extension (although not altogether a successful one, I suspect) was the My First Sony line of kids technology. Those products were probably the biggest impact that the Memphis Group style of the 80s had on pop culture (apart from the set design in Ruthless People, that is). Now the idea is back, in the form of Disney's new electronics for kids. I can already see a set of these in every designer's house. Hell, if the TV was a little bigger and an LCD, I'd buy one right now.
Oh and thanks to Gizmodo for the link My new favorite consumer product geek site.