It was a gloomy, typically chilly late-February afternoon in the West Bank village of Beit Ummar, between Bethlehem and Hebron. The weather didn't deter the children of the Abu-Ayyash family from playing and frolicking outside. One of them, in a Spiderman costume, acted the part by jumping lithely from place to place. Suddenly they noticed a group of Israeli soldiers trudging along the dirt trail across the way. Instantly their expressions turned from joy to dread, and they rushed into the house. It's not the first time they reacted like that, says their father. In fact, it's become a pattern ever since 10-year-old Omar was arrested by troops this past December.

The 10-year-old is one of many hundreds of Palestinian children whom Israel arrests every year: The estimates range between 800 and 1,000. Some are under the age of 15; some are even preteens. A mapping of the locales where these detentions take place reveals a certain pattern: The closer a Palestinian village is to a settlement, the more likely it is that the minors residing there will find themselves in Israeli custody. For example, in the town of Azzun, west of the Karnei Shomron settlement, there's hardly a household that hasn't experienced an arrest. Residents say that in the past five years, more than 150 pupils from the town's only high school have been arrested.