Because a bigger, better toy store has opened that is attracting all its old customers.
Learning about a unique field of engineering--transportation engineering, Hikaru is inspired to design a similar system to the magnetic operated trains in Japan for his parents' toy store. The Maglev trains, which run on repelling magnets, can quite possibly re-attract old customers back into the shop.
Using the engineering design process and LOTS of creativity, Hikaru can hopefully keep his parents' toy store from closing!
Key vocabulary: transportation engineer, Maglev train, magnets, repel, attract, magnetic field, experiment, engineering design process