The reward allocation behavior of 150 children from four to eight years old was studied. Children worked on a task with a fictitious partner whose performance, they were told, was superior, equal, or inferior to their own. They were then given rewards and were told to divide them between themselves and their partners. Results indicated that the children's allocation behavior does change with age in the children who were told that their performance was inferior to that of their partners. Younger children tended to distribute rewards self-interestedly ignoring their own performance. And the children between four and seven preferred to divide equally rather than follow an equity norm, whereas such preference was reversed in eight-year-old children.