Playskool Playskool Alphie Booster Pack - Letters Playskool Playskool Alphie Booster Pack - Letters helps kids to learn about letters in a fun way. The 25 double-sided cards contain more than 300 questions and challenges. These cards are made of plastic for durability and extended use. Why You"ll Love It: Encourage word recognition and letter-sound with a challenge. Age: 3 years and up FeaturesDouble-sided cardsFeatures over 300 questions and challengesEncourages learning with excitementMade of plastic