Book excerpt: Research shows that learning a second language boosts problem-solving, critical thinking, and listening skills, in addition to improving memory, concentration, and the ability to multitask. Children proficient in other languages also show signs of enhanced creativity and mental flexibility. There is a "critical period" or "window of opportunity" when children learn languages best. Studies have shown that this is when children are between birth and six years old. The younger children are, the easier they will learn a second language. As they get older that ability diminishes. These easy and fun flashcards aim to help parents as a useful educational tool for kids to learn a new language.