I am not sure which book of this series was read in my 3 year old's preschool class, but after reading these books we had to take a trip to the ER. I did not know my daughter was reading these books in school and she said she stuck something up her nose like David... well, after sitting and waiting at the ER for 2 hours we found out that she had stuck a screw up her noise. Teachers, please make sure your students know that these are things you really should not do. Otherwise you may have a very worried parent in the Emergency Room who is not accepting of the book choices you are making... make sure it is age appropriate, please.