Yeah, pretty big in the 1980s and had a spin off show called Care Bear cousins that I recall being popular. I actually barely watched the cartoon myself as a kid but I have a bit of nostalgia for them just because they were something that was pretty much everywhere along with He-man, Transformers and Real Ghostbusters.
They seem to be popular again now though, i went to a toy store a few weeks back to get a gift for my housemates son and saw a HUGE Care bear display. I ended up getting the Grumpy one because he looks like he's unimpressed with everything