An old movie about 2 girls and they end up in some alternate reality?

there was a movie i remember seeing when i was a kid and i can't figure out what it was. It was about two girls (they might've been sisters) who go on some sort of adventure outside or possibly ran away. They ended up being in some sort of alternate reality where they willed certain things to happen, like in one scene i remember they wanted to go swimming but they didn't have swim suits and one girl was like all we have to do is just wish for them and all of a sudden they were wearing these flowery bathing suits.... and i think towards the end someone was looking for them and they were standing in some tunnel at the same time but the girls couldn't see whoever it was that was looking for them... if you know what i'm talking about PLEASE let me know what this movie is called