I have a question what is the hight to get in the rides my duaghter is 4 years old and she is 3 feet tall????

There are kids rides as well so she'll definitely be able to go on those. Everything you need to know is here: https://disneyland.disney.go.com/ca/plan/guest-services/height-requirements/

I believe it is 42" on most of the rides

For rides such as splash mountain, thunder mountain I think it's 4 to 4 and a half feet. But she can go on all the kids rides.