I have to send N's lunch to school with him, including a drink. I have lost track of the number of reusable drink/juice bottles he has lost since starting there a year and a half ago. Average life span is one week. I am constantly picking him up and discovering that the bottle has been lost...again. And every time I am told, Oh. He must have thrown it away on accident when he cleaned up. Sorry. I appreciate that they make the kids clean up after themselves and become independent and what not but since, at this point, they have known for a while that N is prone to throwing away his bottles, would it really kill them to keep an eye on him when he's finished and make sure all his stuff makes it back to his cubbie? I don't really think three and a half years old is old enough to be the one the buck stops with just yet.