Coming when called

It is fun to see Zachary learning to come when called. Yes we are using Clicker training for this behavior.
One our biggest concerns are Zach coming to us when called when he wants to anything besides come inside. For 2 training sessions, we worked inside and on the porch. Today we moved to the backyard, where there are numerous distractions. At first we were about 20 feet apart, then we started moving farther apart and even around corners. He tried to anticipate who was going to call him next, but we stayed one paw ahead and kept him guessing. Sometimes I would call him 2 times in a row, sometimes just one. Everyone in the house took part in the coming when called training.
Zach really enjoys training; you can see it in his eyes and tail. Yes he gets special treats, but most important to him I think is our undivided attention.