Source: KidCo
3. Doors
Once your children are tall enough they will be able to open doors and get outside, into the basement or any closet that you may not want them playing in. There are a variety of door locks made that will fit multiple types of doorknobs. They are often removable if you have adult company coming over and are easy for us adults to use. These are a very affordable child proofing tool that is essential for your home.