I was just reading the Mumsnet tips and saw one which said give your child something of yours to take to school, to comfort them - like your hanky.
Just out of interest, do you give your child anything and what?
When I was little and at school, I used to get really homesick (even in those few hours!) and my mum used to give me the tissue she'd used to blot her lipstick on because then I could keep it easily in my pocket, it smelt of her and if I opened it up it looked like a kiss!!! lol! I hardly even used to look at it, just reassuring having it there!