Many riddles are based on word puns and can be an interesting means to help with expanding a child's vocabulary.
A riddle a day can be a great conversation starter between parent and child.
Here is a free list of riddles:
Purple Kitty website - riddlesSome are more clever than others... some are corny... others may use archaic language.
ETA:
- More vocabulary-building resources in this
old post.
- Discussion of vocabulary deficit in this
old post.
- Expanding vocabulary as part of an enriched home environment, found in resources in this
old post- Adult vocabulary skills mentioned in this
old post, and in this
old post (hat tip to philly103).