Angus & Robertson - Fyschwick ACT, Melb Southern Cross DFO stores - 2 books for $5
I bought 'Early Learning Ultimate Activity Book' (includes puzzles, stickers, wipe clean activity pages, colouring in and activity pages) rrp $30 and My First Lettering Book rrp $15 for $2.50 each. Plenty more to choose from, you can go crazy.
ETA: It has been reported that DFO Southern Cross Station in Melb has the same offer now. It might apply to all closing down stores.