There are free downloadable ebooks at http://www.bluejellyfish.com.au/english.html
They cover numbers, colours and a bit about Parrots. They can be purchased cheaply in a myriad of other languages.
There are also free lessons in those languages, which include unusual languages such as Maori, Hawaiian, Welsh, Gaelic, Creole,
http://www.bluejellyfish.com.au/lessons.html