Great

My grandchildren enjoy it very much. However, you need to work on your narrators. They are not lively enough. I say this also for the Green Eggs and Ham apps. Also, the narrators are not consistent with short /a/ vowel sounds. When my kids were growing up in the 90s, I had all your books on tape, and they were exhilarating to listen to.

Jorge Euceda about Hop on Pop, v1.08.1