Before handing the device to a child
Use iOS Guided Access for the safest handoff: Settings > Accessibility > Guided Access, then triple-click the side button in MiniTaps.
MiniTaps hides controls in child mode, but iOS system gestures can only be restricted by Guided Access.
Privacy
MVP guardrail: offline play, no account, no ads, no analytics, no permissions, and no external links in child mode.