Hamtaro is out and about and notices these flying fish windsocks that have been going up around town. He heads to the clubhouse, where he finds that fish are all the rage there too. The clubhouse is decorated with lots of pictures of fish and the ham-hams are all busy trying to design their own flying fish windsocks. The ham-hams encourage Hamtaro to join in, but he notes that he doesn't exactly get a lot of wind in Laura's room. Hamtaro heads home, where Laura and her family are eagerly awaiting the arrival of Laura's Grandma (from previous episodes) and Grandpa (who we have never seen before.) Laura tells Hamtaro that he's going to love Grandpa, who's an inventor. Grandpa is known for some rather crazy inventions. Laura's Mom and Dad think back to Laura's last birthday, where Laura's Grandfather brought a mechanized cake-cutting device. It seemed to be working nicely at first, but then it went haywire, slicing Laura's cake to ruins. Laura was very upset, but Grandpa did try to make u (thetvdb.com)