Kids don't walk like scaled-down adults

Enticing walking toddlers to keep going, even over short distances, can be hard and bigger kids are sometimes just as challenging; but there may be more to their lack of cooperation than simple stubbornness. Children up to the age of 10 seem to tire more easily than adults when walking and, after years of designing and building artificial limbs and braces to help children, Vivian Rose (University of Houston, USA) was sure that kids walk in a...