Help !!! Any ideas / tips on getting sleeping teens out of bed ?

DD is reading and crying " Mum I'm grieving for a character in a book " WM is on his PSP with a new game bought yesterday. ( blood & gore no doubt )

DD is becoming quite a good cook so I've challenged her to cook tonight. This would involve actually getting out of bed, looking through a recipe book, choosing something, shop for groceries & cook it. Yes mum.

Billy the kit is lying on the desk nodding off. He has tried every which way to get the teens up too. Like me, he's given up.

He has discovered The Cat Flap. This would be our bedroom window where the cats can jump down to a tiled one storey roof and into the back garden.

It's taken a few attempts but he has got there.