Absolutely; you're welcome to borrow anything you like from the WigglyPaint deck for your own creations. You might also find it useful to check out the "coloring room" in Charlie's Playhouse. If you download the page, you can unlock it by opening the .deck file in a text editor and deleting the line that reads "locked:1" near the top.
Just in case it's useful, I thought I'd let you know that Decker 1.46 includes a new set of examples called WigglyKit: it essentially breaks WigglyPaint down into a set of modular components that simplifies the process of making similar toys and tools.