When your toddler has graduated from the Duplo stage and is ready to take the next step in his, or her, Lego journey, the Lego Ultimate Building Set is the ideal graduation gift. With 405 pieces stored in a durable plastic box with a see-through top, this set is the perfect place to let children continue to explore their imagination and engineering skills. The Lego Ultimate Building Set contains many small pieces and is designed for kids ages four and older.