Many of us have been sure for ages that if we do not visit inappropriate websites we have nothing to fear from the Internet. Unfortunately, this is no longer true. Ads, mail attachments, social media, and websites masked as official software sources—the dangers are everywhere. For any regular computer user, the necessity of an antivirus software should not even be questioned.
There is a lot of content on the Internet that will allow your kids to develop a number of useful skills, learn something new every day, and have some fun in the process. That said, there's also a lot of harmful and inappropriate content there that isn't well-suited for a young and developing mind. Which is why we recommend every parent to equip themselves with parental control software in order to filter that inappropriate stuff out of their kids' online lives.
Instead of trying to keep a multitude of different passwords in mind or sacrificing your digital security by using some of the same passwords on different websites, get yourself a password manager and enjoy all of the convenience and security measures that any one of these programs has to offer.