I saw Pollyanna as a kid, and again a few years ago. It's a nice movie, but I admit that it didn't stick much with me. I haven't heard of those other Disney films featuring Hayley Mills. I should check them out. Hopefully they're as good as The Parent Trap and That Darn Cat.
I saw 101 Dalmations as a kid and enjoyed it. A number of the classic animated Disney films had theatrical releases in the eighties and my parents took me and my siblings to see those movies. 101 Dalmations was one of those.