What are they and why would I need them? Which is best? I'm a bit confused, and I have an idea they are expensive in the UK, so I might look when in Canada later this year. What would you all recommend? And what is a sidekick - do I need that too? I've got a feeling they punch out letters, but I have no idea how they work, and what you use - fun foam? cardstock? papers? I'm slowly coming to grips with most of the terminology for scrapping but this leaves me a bit confused! Any advice gratefully received!