Have a look around salvos, roadside collections for old furniture - chests of drawers are great, a little paint and they come up nicely. If you find a chest of drawers that's quite wide, cut off some of the bottom drawers and remove the handles, replace with tassels or something and they can do as coffee tables or sofa tables.

Old filing cabinets are very deep and great for toys - paint them and cover with really cool gift wrap and contact to protect .. or a laminate / laminext if you can find some at Bunnings etc. Replace the handles again with something less "industrial" and it'll look great. 2 x 2-drawer filing cabinets & an old door make a great table, it can all have the same laminate.

(I have a filing cabinet that I'm in the process of doing up)