LOL, lots of confusion in this thread.
Silpat: silicone baking mat with many wonderful uses.
CelBoard: like a small plastic cutting board on which you can roll out fondant and gumpaste. There are three versions, with various lengths and numbers of grooves. When you roll gumpaste out over the grooves, the grooves allow us to thread wire into the gumpaste for creating individually wired leaves and petals.
CelPad: spongy, thick foam mat used for thinning and ruffling petals. One version also has holes for working on Mexican hat flowers.
Get all three! I find all three things indispensable.
Link to prices and pictures (scroll down to the bottom with more on page 2): http://www.globalsugarart.com/cat.php?cid=766