The first Tone and Pinyin Practice has been added to the Premium section just after Lesson 4.  We had it there before, but feedback was that the audio wasn't good enough (which I agree).  That has since been improved and it's now back up.  I will try and add more of these type of practice as it's a great way to practice pronunciation and reading Pinyin without having to focus on meaning (although the meaning is quite cute!).