Purchased as educational materials for a LEGO school. Since the school used school-specific materials and this was kept at home, it hasn't been used much. Missing parts are unknown. The motor works without any problems. (Batteries are included, but will need to be replaced eventually.) ＜One set can be used for various lesson contents＞ This set is for learning about mechanics, engineering, energy, measurement, and other learning items, as well as enjoying the principles of gears, pulleys, levers, and inclined planes. ＜Set Contents＞ LEGO blocks, parts: 396 pieces total, 9V motor: 1 Battery box: 1, Cable: 1 ※Requires 6 AA batteries (batteries are not included) Assembly instructions: 18 types of main model assembly instructions: 2 each Basic model assembly instructions for learning principles: 2 each Dedicated storage case (with storage tray) Top card (with map for storage tray) ※By using the storage tray map, you can sort and store many parts. ※Adapted to the new curriculum guidelines ＜Applicable lesson contents＞ ＝Science＝ Elementary School 3rd Grade: The work of wind (land yacht, windmill) Elementary School 5th Grade: Pendulum motion (tick-tock clock) Elementary School 6th Grade: The regularity of levers (experimental lever (beam balance)) Junior High School 3rd Grade: Regularity of motion A) Balance of forces (experimental lever (beam balance)) B) Speed and direction of objects (tick-tock clock, free-wheeling) C) About force and motion (free-wheeling, flywheeler) Junior High School 3rd Grade: Mechanical energy (hammer, flywheeler) ＝Technology (Junior High School)＝ ・Technology related to energy conversion: Methods of energy conversion and mechanisms of force transmission: gears, cam mechanisms, belts, pulleys, screws (basic model for learning principles, cleaning car, fishing rod, free-wheeling, hammer, measuring wheel, letter scale, tick-tock clock, windmill, land yacht, flywheeler, experimental lever (beam balance), inclined plane (inclined stand), power car, dragster, walker, dogbot, tower crane, gear racer) ・Design and production of products using technology related to energy conversion: Production of equipment and simple robots that can be used in daily life, production of models using motors (power car, dragster, walker, dogbot, tower crane)