This set provides four Story Blox - The City kits (SB-0149), all packed into a sturdy storage case for sharing in the classroom. Contains 552 parts. Directly compatible with other brick building construction sets. Requires four 9V battery. The City is a chapter in the E-Blox® novelette "Earth One". Ride along with Seymour E. Blox as he travels in an organic submarine named Mimi that travels faster than the speed of sound under water. Help Seymour repair a very famous bridge that is being destroyed by industrial pollution in a large and ancient city. Help Seymour make emergency repairs to the bridge in the middle of the night as the city sleeps. Investigate a strangely shaped building that is used as city hall, visit a famous clock tower and much more.