LEGO Education DUPLO Creative Builder & XL Bulk Set Combo Pack 992124 (684 Bricks, 12 Building Cards) 684-piece LEGO Education DUPLO creative builder and XL bulk set combo pack with 12 building cards Includes two full LEGO DUPLO sets with a range of bricks and figures that can be combined for new configurations 12 double-sided building cards guide students through assembly and can fit into card holder base plates to provide scene backgrounds Activities help students understand concepts of shape, space, and numeracy, while encouraging collaboration Supports a group of four students, ages two to five years