Art/graphic design, fiction, drawing and maybe even a karaoke contest if I could get hole of decent equipment and I had ONE week in my life where my voice didn't SUCK (lol)
I also suggested other. Maybe one of these:
Ayu cosplay
Ayu goods (such as dolls making or clothes etc)
Make Ayu's face out of the strangest thing you can find (string, clumps of dirt, whatever--so long as it looks like Ayu
)
They might be a little weird though ^^;