I personally adore this series. I started reading this series in the second grade and I really think that is a good age range to start reading this series with. Especially for those advanced readers who are moving onto chapter books. The narrator/author exposes the reader to challenging vocabulary. These words are always explained to the reader.
This is a really cute book for any age to read during election season. I think this could be used to hold a class election, even if it is using cartoon characters. I think it could be really fun to use if you are teaching the students about the election process, so then by using different text students can make text to self/community connections.