In this article, the authors discuss how children learn to problem solve from birth to 6 years. At 0 to 2 years, children learn to be very effective problem solvers by encouraging children's explorations and supporting their efforts to resolve difficulties. When they reach 3 years old, children enjoy experimenting with a wide variety of materials, and develop their problem-solving through trial and error, while 4-year-olds enjoy solving problems with their friends and working together cooperatively. By the age of 5 or 6, children are already experienced problem solvers and they tackle more sophisticated dilemmas, not only on concrete level, but on abstract-thinking level as well. One of the strongest skills that 5- and 6-year-olds bring to problem solving is their ability to use deductive reasoning by interpreting clues.