Apparently the Palestinians recently used a 10-year old boy (without his knowledge) to try to carry an explosive belt (to be used by a suicide bomber) into Israel:

Abdallah Quran, of the Balata refugee camp east of Nablus, makes a living by transferring bags from one side of the road block to the other. He told the soldiers that every day after school, where he attends the fourth grade, he takes his cart to the Hawara barricade to help invalids and women transfer their bags in his cart, while they wait in line for the security checks.

"A few people piled on their bags, and I waited for a few more because I get paid for every bag. A few people put their bag on my cart, and I don't remember who put the bag with the bomb," he said.