The Slipslide Water Park is a water park Greg and Rodrick went to when they were little kids. They both have bad memories from it. Greg dislikes it because he didn't go on any rides with Grandpa because of a sign that said 'Under 48", must be accompanied by an adult'. Greg thought that meant you had to be 48 years old to ride alone, but it actually meant 48 inches. And Rodrick dislikes it because when his band, Löded Diper, was playing there, they had to use a bubble machine instead of a smoke machine because someone had switched the machines. The park appears in Diary of a Wimpy Kid: Dog Days. One day in Greg's summer vacation, Susan takes the whole family there for a family outing, but when they got there, they had to leave early as lightning struck and there was a traffic jam at the car