I'm not an expert in pedometers, by any means, but these are my top choices for inexpensive, efficient and user friendly pedometers that would be easy for kids to use. For expert advice and pedometers with more features, check Wendy Bumgardner's Best Pedometer Picks.
1. Yamax SW-200 Digiwalker Pedometer
This is the pedometer that I use. It's accurate, easy to use and compact. It doesn't have anything fancy, but accurately counts steps and has a flip case to guard against accidental reset.
2. Walk the Walk
Walk the Walk is full of creative and entertaining ways to use the child-friendly pedometer that comes attached to the colorful book.3. Sportline 330 Electronic Step Pedometer
This is an inexpensive pedometer that has a large electronic display, a flip case and a reset button.