Diamondback 2013 Youth Octane Mountain Bike (24-Inch Wheels, Copper)
When a little boy gets too big for a 20" wheeled bike the Octane 24 is the way to go.  The heat treated aluminum frame will hold up to the trials of childhood while the 40mm suspension fork will make heading down the dirt paths much more fun.  Add in both front and rear twist shifters and he will have lots of gears to experiment with.  The linear pull front and rear brakes will make stopping easy.  Put your little one on a Octane 24 and watch in amazement as he grows - both on and off the bike.