MightyMind Magnetic Challenger Kids choose from brightly colored magetic shapes to complete their design! 26 designed puzzle boards are consecutively lettered to show level of difficulty Great for travel - metal box functions as storage container and design board! Excellent transition from MightyMind to SuperMind Ideal for ages 4 - 9 years old THE ONLY ACTIVITY TOY IN THE ENTIRE WORLD THAT SHOWS A CHILD STEP-BY-STEP HOW TO BUILD AND SOLVE PUZZLES.