Plot so thin, it passes unnoticed.

It's hard to see any effort in the film. There's no comedy to speak of, no real drama and, worst of all.

Yes, absolutely, there is fun to be had, as well as many, many things to go boom, all amid an atmospheric urban jungle.

Story: It's very simple but honestly that is fine.

My six-year-old liked it, but I suspect children over eight will find it rather slow and tame compared with stuff like "Home Alone" (which I find rather offensive). Nothing to offend prudish parents here, no violence, bad language or supernatural events. Competent direction and camera-work so it did not look desperately low budget, though there were several sequences of kids walking or bicycling, or of moving cars or trains, which padded out the length to 90 mins without adding content. The young female lead was fresh and uncloying, but her cohorts were the usual stereotypes (fat boy, boffin, racial minority, etc).Lame plot, and maybe I dozed off and missed something, but the solution of the "mystery" seemed rather fortuitous.I give it 5 for children from 6 to 8, or for "old-fashioned" children a little older.