Something else we tried last weekend: taking the training wheels off of Ryan's bike. We didn't do it for long because it was getting dark, but Scott rode him around in the grass for a bit.
A photo with no flash, but not enough natural light (I said it was getting dark):
A photo with a flash that makes it look darker than it really is:
Oh, what the heck, when the light doesn't agree, just take a video:
By the way, those little noises in the background are Jillian, not me. :)