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.