J.T.
Sounds to me something happened their. kids do get mommy sick and usually it goes away. But if he's doing it all day then something is going on. maybe hes getting ignored or maybe another kid did something to him. if it keeps up and dont stop i would bring him somewhere else. kids dont cry for no reason. Im not trying to scare you but i would really find out if something happened why he was there. never be to trustfull if you know what i mean. But then again he might just not like it there. just ask him if anything happened or if he likes it there. kids arent dumb if you know what i mean. sometimes you just can never make a kid happy lol. i wish you luck.
J.