Studying may be the last thing on a tot's mind during Summer break, but there really is some truth behind the theory of Summer brain drain. During the break from school, kids lose approximately 2.6 months of grade level equivalency in math and reading skills, but the slide is easy to stop. You don't need a stash of workbooks to keep kids' brains going, just a few toys and apps that disguise the learning behind some fun activities. Don't believe us? Click through to see 10 picks for kids from preschool through elementary school.