Owen and Mason have recently been loving their horses that they got for Christmas. A couple of months ago they were afraid of them but now they can't get enough of them. Owen in particular will see his horse and start "bopping" and making a clicking noise that souds like the "clip clop" of a horse. In this video you can see him pull back on the reigns and try to neigh.
Also, the other day we were watching John and Kate Plus 8 and one of the kids on that show was dressed up like a duck and quacking. Without missing a beat, Owen started "quacking," which is more of a Ga Ga Ga or Ca Ca Ca sound, but it's still a new sound for him. We caught some of it here.