Every young engineer can build objects from the real world. The set is made of durable plastic and includes a spanner, screws, pulleys, nuts, etc. To encourage children's abilities, 6 large sheets detailing the construction of various designs are included. Each set includes 81 pieces and 6 activity cards.Details:9.2" x 9.7" x 2.8"The set is made of durable plastic and includes a spanner, screws, pulleys, nuts, etc.Includes 81 pieces and 6 activity cardsFor ages 4 and up