OK, so there is this movie/ show that I've been triyng to remember. I can't remember too much of it, so I need some help. The beginning started with two kids who were visiting somewhere like a grandparent or something like that. They went into the attic n=and found this magic necklace or something like that. Then they were transported to a magical world where they met this puppet, who was dying for some reason, they helped him to get somewhere to make him better, then there was a witch lady and she had this guy on the wall who was just a head, no body just ba head, but she was evil and so the two kids rescued the head guy, then they were going up a waterfall and the head guy decided to go back. So then the kids eventually got to this place and they put the magic necklace into the slot and it made a bunch of kids come from around the world, then this big guy came out and he did something to make all the kids go back, I must note that the witch, the head guy, the guy the kids were to save and the big guy were all puppets.
if you can help I would be very appreciative thanks.