[TOMT][movie] Kids movie where they are followed by men in fedora and time is stopped at one point.

Google isn't turning up anything useful. Basically I remember the following, but there is actually a small chance that I have mixed up different movies together:

Men in fedora and suits are some kind of agents, they maybe had numbers? At one point they disappear one by one somehow if the kids destroyed or did a certain thing which I don't recall. I remember a scene where the suited fedora guys run after the kids along a street frozen in time.

There was a turtle with something written on it that guides a girl to somewhere.

Old man who manipulates time, there was a scene when he is in a planetarium and talks to the kids.

At one point everything turns upside down and it somehow involves the turtle. (i'm not too sure about this one)