With our girls turning 3 and 6 this summer, it's easy for my wife and I to see the difference in skill level between "The Rock Daughters," and to consider the difference in development when comparing how our oldest was when she was the same age as our youngest. In a few spots, Addie was undoubtedly presented with vehicles that were ahead of her age and skill level - something that's easier to see now. She received a 12" bike for her second or third birthday, then a 20" for her fifth birthday, and now here she is about to turn six and there's still training wheels on both. Little Finn on the other hand is working both a Radio Flyer Tricycle and the 12" Huffy Cinderella bike that she's inherited from big sister, but the game just changed. When the folks at STRIDER approached me about having the girls try one of their famed "balance bikes" (no pedals, no training wheels), with the idea that both of my girls could soon learn balance to graduate from the trikes and training wheels, I was skeptical at best. Does the STRIDER Bike really teach balance?