Well, I'm looking for the title of a claymation feature, I saw it on TV in the late 80s, possibly on Nickodeon (or Disney). It has cave people and dinosaurs. The cave boy is smarter than the other cave people and is asking lots of questions. While he is with some talking dinosaur friends, he even breaks into song. The dinosaurs are singing back up with "Wonder, Wonder Why!" And they'll repeat some things he says, "Why birds do fly?" "Why can't I" "Why are dreams so?". I think one of his main issues was he was tired of sleeping in caves and on rocks or something. That's about all I can remember.

Try this:
‪Stanley and the Dinosaurs "I Wonder Why"‬‏ - YouTube (http://www.youtube.com/watch?v=kbONIXW-fR8)

Awesome

:)