Our little girl walks straight passed the bowl of crunchies outside our bedroom door at about 3.20am so that she can jump on my head, and if that fails to rouse me sufficiently, commence pushing 'things' off surfaces until I get out of bed. My sole function at this point is to escort her back to the bowl of crunchies, stir them with my finger and pet her whilst she starts to eat them. I may then go back to bed.
Occasionally we have a repeat performance at 5.40am, too....
If you ever find out how to stop it, please let me know. :o)