You want a "set it and forget it" tablet with modern Android features and strong parental controls.
Flashing tools and methods differ between MediaTek, Unisoc, and Qualcomm. Most Blackview kids’ tablets are MTK-based. Firmware BLACKVIEW Tab 50 Kids
: Built-in features allow parents to set usage time limits and filter content to ensure a secure digital experience. You want a "set it and forget it"