Going Ambidextrus (iI don't care if thats not how you spell it....)

Me and my friend issy (http://everythingmaniaworld.blogspot.com) have decided to become abedextrus ( If i'm so terrible at spelling that you don't understand what i'm saying then i mean right and left handed), once a week we will spend a day writing with our left hands. The only trouble is I just found out my dad who is left handed spent the whole school hholidays writing a page with his right hand and he's still not completly ambedextrus! Issy and I are going to have a hard time!