You can delete a Roblox account by simply emailing the company, but there are a few other ways to do it.
There's a wide range of ages when it comes to the Roblox generation and I speak from experience as a librarian having to shush both kids and teens for being too loud on the computers while playing.
You can upload a file on Google Forms, allowing you to add an image or video to supplement your survey, quiz, or sign-up sheet.