Emus can be trained to walk on a leash and harness. I have friends who take their female to farmer's markets with them... they sell emu products and Winston is always a huge hit when she tags along. She was had raised from the time she hatched.
I was given my breeding pair when they were about 18 months old. Though they are friendly, they're not trained to walk on a harness/leash, and never learned to accept other animals in their pen/run. My birds came from a commercial breeder who raised hundreds of birds at a time for the meat, oil, feathers, leather, etc., so they're more comfortable in a large pen than running loose on our property. Our pen is 100' long by about 30' wide, and 6' tall non-climb horse fencing. In fact, we built the pen just like we do our horse pastures. Enoch and BoomBoom have an 8' x 8' x 6' tall "coop" that they completely ignore, except when they eat as their feeder in under cover. They prefer to sleep and build their nest under a large cedar tree in their pen.
Here's a pic of this year's chicks when they were still in their brooder inside a coop.
As they get older they lose their stripes and gain a blue-ish irridescence along their necks, which you can just barely see in the next pic. Enoch (foreground) looks like he was having a bad hair day when the pic was taken.
Chickenzoo... I love the pics you posted of your birds. Very cute!