You want it to be good, you really do. It's got a lot of great ingredients: pirates, treasure, kids lost in the bayou, the real mayor of New Orleans, a handful of jazz legends, and a strange-looking puppet called the Labou. But, sadly, this movie could be out-shined by any number of school play productions. The cast members are not given a whole lot to work with (how many times can a kid say "whatever" in a single movie?) so kids aren't likely to identify with the young characters.
Moreover, the Labou itself is a sideline to all of the other stuff going on. The magical creature, whose whistles are rumored to be the inspiration for jazz, gets tossed in Emily's backpack and tweets once in a while to show that it's alive, but that's about it. Some kids will enjoy the adventure, although adult fans of New Orleans culture are likely to be disappointed.