Hamburg-based creative and graduate of the Miami Ad School Christian Baur conceived this sneaky way to get people involved in animal protection and support pan-European animal charity ETN. Baur created a football that howls when it's kicked or moved and placed it on a Hamburg street. Passersby would either kick the ball or just stop to pick it up, where they'd see the message "Stop killing dogs for Euro 2012. Thousands of dogs and cats get killed, burned or poisoned because of the Euro 2012. Please help us to stop this massacre." The ball carries a phone number for SMS donations and a QR code that can be scanned for more information.Read more about the effort in Behind the Work.