All that I can remember from this movie is that they are real human children, they find what I believe is like a gem or rock, that takes them to a land/world with puppets (and no it's not dragon tales!) they become friends with one puppet but he gets hurt and they have carry if around while these other bad puppets are trying to find him. And at some point in the movie they have to cross a big bridge?

The Argon Quest (http://www.imdb.com/title/tt0099055/reference)

Possibly "Puppet Masters", not sure and Ive seen hundreds.