Children get blamed for many things. Kids are not the sole cause of ruined hardwood flooring, but they do rank on top as one of the major causes of hardwood damage. Kids, of course, can sometimes be intentionally malicious: gouging floors with protractors, pounding floors with toys, letting loose with indelible markers. But most often, kids ruin hardwood floors because adults have not taken proper precautions.
Be vigilant about keeping wheeled toys out of the house. Wheeled toys that sometimes go outside are sure to pick up pebbles in the treads and scratch the hardwood. The same goes for children’s shoes. Enforce a no-shoes policy in the house for children and adults alike.