Super Mind Design BookEXPANDS MIGHTYMIND PUZZLE SERIES with more challenging patterns that will keep kids creatively busy for hours. MAKES KIDS SMARTER and PARENTS CAN ACTUALLY SEE IT HAPPENING, because the numbers on the puzzle patterns show the level that a child has achieved as a child plays with it. Its like a measuring stick showing a childs progress. DEVELOPS ESSENTIAL LOGICAL THINKING SKILLS, dexterity, eye hand coordination, patience, and creative problem solving.