Seems to me you could easily use NF1 Labels, lists and captions and NF4 Information texts. You might be able to find some texts from other cultures- don't know if there's an easy version of Kipling's 'Just So' stories? Handa's surprise might be useful for exotic fruits from the jungle? But if you don't have to stick strictly to the old lit. units, children could write about If I were an animal I'd be . . . . . because . . . . . and do some investigative work about jungle animals. Lots of scope for descriptive writing, letter writing, instructions how to look after xxx etc.