You don't need to take out a mortgage to entertain the kids in Melbourne. There are plenty of free and inexpensive activities to delight young 'uns.
Cheap kids activities in Melbourne
For an annual subscription, the Moonee Valley Toy Library offers a choice of 1,000 toys (for ages 0-6) for three weeks. Subs cost $50 ($25 conc) for three toys, or $80 ($40 conc) for six toys, and free if your kid is under six months. Lots of other suburban toy libraries offer similar deals, so find your nearest one.