We have some of those books, my kids used to love them too :)
Actually we love them enough that they stayed on the bookshelves even though all my kids are now older than you :D (or at least I think they are all older than you, the youngest one is 12).
Four languages wow, that's very impressive! Is your sister learning how to read in Khmer as well?
Well, the youngest one is my age. I love reading and I love both fiction and non-fiction. My sister study Khmer too but she is not into it. Have a good day.