i've no doubt that all you old hands know this already, but something i found out at my 2nd scan yesterday is that if you want to make your baby wriggle and fidget you should shovel down a good old bar of choc. the sugar hits him in around 10/15 minutes and off he goes.
while this is most likely not hot news to lots of folk, to novices (like me) and worriers (like me) it's an easy way to get a bit of reassurance if you've not felt much movement from your baby in a little while.
the fact that they recommended choc and not an apple is also handy of course......