When Laura and her family go to the amusement park, Hamtaro shares the news with the Ham-Hams. Panda decides to build a Ham-Ham fun park, but Boss, Howdy, and Stan have their doubts about it. The rest of the Ham-Hams help Panda build his Ham-Ham fun park. Eventually, Boss, Howdy, and Stan realize that the fun park is actually working, and they come to help. Meanwhile, on the way to the amusement park, Laura's family's car breaks down, and Kana and her parents stop to help. While their parents work on the car, Laura and Kana find a small kiddie park and decide its much more fun than the big amusement park.