Grandfather Flump oversleeps and is the last to have breakfast, he suddenly remembers it is his birthday - but there are no cards or presents for him and no-one has wished him Happy Birthday. He sets out to jog their memories.

Everyone in the Flump household keeps losing things so they set-up a lost property box. The children first play 'Hunt the Thimble' then 'Hide and Seek' but then Mother comes and tells them that she can't find Grandpa anywhere.