Traveling to the Digital World was an experience that leaves the children bewildered. Their Digimon partners are suddenly thrust upon them, as well as the concept of having the Digimon digivolve into stronger creatures, and so the children have to find out how to be DigiDestined as they go along. They quickly learn of the Digital World's plight, and how evil Digimon are intent on ruling it for themselves. Although they originally fight just to return home, they eventually vow to save the Digital World for the sake of their Digimon friends. As the plot evolves, the children deal with various aspects of maturity: making friends, being courageous, standing for one's morals, etc. Each child receives an object called a "Crest" that embodies a particular trait that defines them, whose power could be used to digivolve their partners to the next level. Taichi "Tai" Kamiya has Courage, Yamato "Matt" Ishida has Friendship, Sora Takenouchi has Love, Mimi Tachikawa has Sincerity, Koushiro "Izzy" Izumi has Knowledge, Joe Kido has Reliability, and Takeru "T.K." Takaishi has Hope. It is later revealed that the children were chosen to become DigiDestined during the battle between Greymon and Parrotmon, and that their Crests represent the positive personality traits that they most strongly evinced at that time.