Here is a great ad from Telstra Bigpond (their internet arm) in 2006.

Daniel: Dad, Why did they build the great wall of china?

Father: To keep out the rabbits …

Only 30 seconds long – worth a watch.
Proves that kids need the internet to research things that their Dads don’t know.

My other all-time favourite is “not happy Jan”, an ad for the Australian Yellow Pages directory in 2000.

It became a popular catchphrase for years to come and any Australian knows exactly what you mean when you say “not happy Jan!”.

They don’t make ads like these anymore…