This was my first center step card and I found the very helpful video at Dawn's Stamping Studio. It looks a bit complicated but is really quite simple.
I found these adorable foam penguins and snowmen with Santa hats at Michaels. There is actually a very cute penguin dp in the center panel, but it doesn't show up very well. There will definitely be another project showcasing that fun paper. The foam glittery snow flakes are from a stash I've been using for a couple of years. The sentiments are computer generated. This is a good project for using up scraps of card stock from other projects, too.
Here's a side view. The secret's in the folds.