Henry and Mudge the dog's boring weekend becomes interesting when Mom suggests building a castle in the basement.

While Henry's parents are at a Sweetheart Dance on Valentine's Day, he and his dog Mudge have a wonderful time staying at Mrs. Hopper's house, where they enjoy tea and music and dressing up in various costumes.

Henry and his slobbering dog Mudge are visiting Great-Grandpa Bill, who lives in a house with lots of other grandpas. Henry likes the grandpas because they play checkers and rock in rocking chairs. Mudge likes them because they feed him mint candies. When Henry and Mudge leave the house to go exploring, they find a beautiful swimming pond. They come back to let everybody know, and soon all the grandpas want to go swimming. Henry's father says, "We'll...