I think most of us are not trying to accelerate our children, but just trying to keep up with their development. And although my children learned to ride bikes when they were 4 and 3 with very little assistance from me, I do not see how I would have been able to make them read at age 2. Children have to meet certain developmental milestones to be ready to ride a bike, or to read, or write. Those milestones rarely can be reached by force.