Park rangers later killed a bear matching the description of the one in the attack.
Park spokesman Bob Miller says the incident began around 7:30 p.m. Monday when the bear approached Evan Pala of Boca Raton, Florida, while he was playing in a creek. Miller says the bear attacked the boy, was driven off and came back a second time.
Miller says the father was able to drive the bear off with rocks and sticks.
The boy suffered some puncture wounds that were serious but not believed to be life-threatening. The father, John Pala, suffered several cuts during the attack.