What is the origin of the phrase...

[mrwilliams]

"Silly rabbit, tricks are for kids" - I have been on the internet, and all I get are the quote from Kill Bill - but I am sure I have heard the phrase in other films, tv shows, and I would like to know where it originates from. Any help appreciated.

[kempie]

http://en.wikipedia.org/wiki/Trix_(cereal)

[mrwilliams]

Thanks for that - I'd been looking everywhere!