Here's what Ben says about the big bike:
The big bike is cool because it's fast fast fast but the wind works against me on the windy days, so I can't go my fastest on the windy days unless I'm working with the wind.
At first it was hard to ride my big bike. It's still hard because it has a hole in the back wheel and the wheel gets soft and it's hard to get on and go straight. What I do, I just walk my bike to the slant part and I go down the slant park and I just go keep on riding. It just helps me 'cause it goes faster. It's good and it's fun!