Melissa & Doug® Ms. Rachel 1st Words Flashcards. Sensory play boosts memory skills and helps littles connect words to what they hear, see, and feel. This set of 30 double-sided cards includes textured surfaces, soft and fuzzy fabric, and five special lift-the-flap peek-a-boo cards to surprise and delight! Set includes a special bonus Learning Card with play ideas and skill-building tips for caregivers. For children through their ages and stages, from 2-5+ years.