The Parental Control Illusion
The biggest thing you need to know about Roku isn't the 4K resolution or the snappy remote—it's the limitation of its PIN system. When you set a parental control PIN on a Roku, you might think you've locked down the TV. You haven't. That PIN primarily controls The Roku Channel and prevents new apps from being downloaded.
Once a kid is inside an app like YouTube or Prime Video, they are in a different kingdom with its own rules. If you want to keep your seven-year-old off the weird side of YouTube, you have to configure that inside the YouTube app. Roku doesn't have a 'global' filter that can scrub content across all platforms.
Physical Safety Matters
It sounds like boilerplate, but Roku is one of the few tech companies that is very loud about their remotes not being toys. Between the small batteries, the rubber buttons that can be chewed off, and the plastic packaging, these are strictly 'high shelf' items for households with toddlers.
Why it Wins on Usability
Where Roku beats the competition (like Fire TV or Apple TV) is in its single-mindedness. It doesn't care which streaming service you use as long as you use it through their box. The interface is a simple grid of apps. No complex layers, no aggressive 'Up Next' queues that you can't turn off. For a parent trying to get a show on so they can finally start dinner, that lack of friction is a feature, not a bug.