Tick a box on a form and you have apparently achieved something . But the statement " this book is for a x year old " is meaningless . The only meaningful statement is " this book is for whoever has the maturity to read it . " Oh dear .

Question: What may be the reason for age restrictions being meaningless ?
Answer: Because people do n't pay attention to it .Because they are n't true .Because it 's just a gimmick .Because different kids read at different levels .