This evening when we were with Citrus, my daughter found a little bike with training wheels and started riding it in the stall aisle. Citrus will notice a cycle from across a huge field when we are riding- so this got his attention.
I had her ride up to him, then back up a bit. The first time he did his wide front leg, big eyed, snort but then wanted to follow it. I let him. Then I had her ride up to him and stop when I saw him get that look in his eyes. I then would walk him up to it and let him sniff to his hearts content. (He is big into smelling things- even the things he sees daily- his saddle, his brushes)
After a few passes, he was good with it. I wish I had pictures because he was stretching his neck like Arabians do. Very cute.