I apologize up front . . . I'm sure this has been discussed somewhere, I just didn't take the time to really hunt for the thread . . . but can you use your blender pen with the watercolor crayons? I'm getting ready to order the crayons and I'm just wondering if I HAVE to have the aquapainter (which seems like it would be challenging for me), or can I just use my blender pen with them? Thanks for your help!