The first is: we turn all of the lights off in the room and shine a flash light onto my tummy, moving it slowly from side to side. Usually the baby will respond to the light and either move with it or kick/punch where you have shined the light!
The second is: we took a toilet paper roll and my husband placed it up to my belly to try and find her heart beat -- this is neat because you can sometimes tell where your baby is positioned based on where you hear the beat.
Both of these fun activities won't work until you're in your sixth month or later :)
This picture (below) is not my belly or baby's little foot, but I had to post it... very cool?!
SOME WOMAN'S TUMMY :)