$14.00 LeapFrog Quantum Leap Turbo Twist Brain Quest Handheld, Leap Frog, Teaches Social Studies, Science, English and More. Your kids will learn as they twist and turn with LeapFrog Brain Quest. The game uses Brain Quest software on the LeapFrog Turbo Twist hardware to teach youngsters about social studies, science and English. Approved by educational experts, Brain Quest can be adjusted for skill levels to suit grades 1-6. Includes a headphone jack for quiet play