Is your battery running out at the Park? We recommend this charger, it charge your phone 6-8 times (full charges), it is amazing http://amzn.to/vEV5VF (MW benefits if you purchase)
This is one of my daughter's favorite souvineers from WDW. She had the characters sign her shirt front and back. Characters will sign clothing as long as your not wearing it. If you do this make sure to use a permanent fabric marker.