I'll first jump to the bottom line. My 6 old daughter rate it 100 out of 100 and comment it's better than Harry potter so I must rate it accordingly. I'll recommend this movie to elementary school kids, which could identify with school issues such tough teacher, bullies etc... smaller kids could get bored in the 'slower' parts or more 'serious' part such when the main character family deal with the past (death of Adam brother). The special effect looks very good, and the sound it great. The story line itself is a bit childish and I think they could make is more intelligent and by so make it more appealing for grown ups without 'losing' the kids but over all it a great family movie.
