If you love shopping & have a great eye for deals, you can become an eBay or Amazon flipper! Scour garage sales, estate sales, Craigslist, or thrift shops for good finds.
If your kids love dogs, you can combine taking your kids on walks and dog walking. This is a great way to exercise, and you can make some nice money while you are doing it.
Good tutors get paid a lot of money. Many parents will pay a lot of money for a good tutor to help their struggling child or to help their kids do better in certain subjects.