Looking for a Theme/Module that can handle personal messages

[shredsec]

I’m looking to sell greetings cards that will be printed with a personal message input by the buyer. Is there a theme or module that can accept messages from a buyer when they’re choosing their card?

[shredsec]

Thanks but I'm wanting a module that the customer can use on the product page. 

I might be able to use the one you've suggested but I can't find a demo of the order validation process anywhere.