Only with the closest of supervision (i.e. you are sitting right there and monitoring the activity) and with child-safe filters on it. Then remove device to hidden place when done with activity. If they accidentally landed on a porn site or downloaded something illegal like (heaven forbid) child porn you would be in for a legal world of pain if it was your device.
1. Rouge trader dumps 400Billion of treasuries after Trump speech.
2. Nukes launched at Venezuela, confusion at to why
3. Scientists predict seas to rise 100 feet in next year, have redone global warming numbers
You get the idea.