The key to leading a long, healthy life is to make healthy choices a habit. Starting these habits as early as possible can help to ensure that your kids are able to lead happy, healthy lives. The average American has a life expectancy of 78 years, but that number changes based on income level, region, and some other demographic descriptors. To help your child live a long life, you can help them develop healthy habits as early as possible. The tips below are a few ways you can set your child up for healthy habits they can use for years to come.