In general, and depending on how you define it, it takes about 1-2 weeks to "recover" from a breast reduction.
Actually, of course, it's more involved than that. Most patients feel better at even 1-2 days after the surgery than they did before (ie, despite the discomfort of the surgical procedure, they're relieved of the neck, back and shoulder pain). Most people need about a week off of work before returning, though it could be less if the recovery is going well and/or it's a relative non-physical job, or more if the recovery is slower and/or it's a more physical job.
It's about three weeks before you can return to exercise, and up to several months until you're fully healed.
That being said, most women tolerate the procedure extremely well and recover surprisingly quickly.
And you young kids - you should bounce back real quick!
I hope that this helps, and good luck,