Your first instinct might be to scoop them up and take them home, but that may not be what's best for the kittens. There's lots to consider when deciding if a kitten should be brought indoors. It's important to remember: Not every outdoor kitten needs saving.
The best place for kittens is with mom. Don't try to separate kittens younger than 8 weeks old from their mother unless there is a medical emergency.
The above infographic is from the Alley Cat Allies website