Excellent site that is based around a database of the internet which acts as the vanguard of myWOT and lot of security aggregators for researching website domain and registrar/registrant information for websites that may be considred suspicious or require more information than just the contact pages of the website you want information on.
Useful to look for the information on domain names.
Since the information requires some knowledge of how to use what is displayed, it may not be useful for children, therefore I voted that this site was not suitable for children.
Is that unsolicited email (that you accidentally opened) really from your Australian bank or from a phishing site? USE this service and if (for e.g) it comes from Romania, you can thank WHOIS for helping you save yourself. Not so much for beginners, the most vulnerable, but a very useful service indeed.
I have no idea in what category would enter a misinformation I read on that site -including my wrong IP number (that I checked how appears on my computer but also in Google Chrome browser that I trust)! Yesterday and today this site has had maybe "malevolent content" Please check and see for yourself! I have done a document with print screens if interested!