I was wrong.
It was a complete waste of $25, stupid from front to back. I don't know what their target demographic is, but it must be significantly younger than the 12-year-old stars of the movie. Except for the house and school, I suspect no sets at all were used here. The blending in the use of green screens was just awful.
It's too bad, because the plot concept is not horrible. In fact, the basic plot is quite similar to the wonderful movie, Neverending Story, which succeeded without the gratuitous use of 3D.
I do wonder if Taylor Dooley was chosen for the role of Lava Girl because of her incredibly striking resemblance to Alyssa Milano.