KRIDDO Toddler Balance Bike 2 Year Old, Age 24 Months to 5 Years Old, 12 Inch Push Bicycle with Customize Plate (3 Sets of Stickers Included), Steady Balancing, Gift Bike for 2-3 Boys Girls 4.6 out of 5 stars 3,422 1 offer from$69.99 ...
in engineering from Purdue University in 1969 and taught systems theory for three decades at the University of Illinois in Urbana-Champaign before retiring in 1995. He holds a particular interest in bicycle stability and control, and has devoted much of his time and energy to the development of...