I wanted to LOVE this, but of the two water pens it came with, one won't even open and the other won't close 100 percent and too much water comes from the tip. This results in a nice drawing for the first five seconds, then a blurb. My son keeps asking what is happening to his drawings. I'm still able to use the mat with a cup of water and regular paintbrush, but really wanted to be able to use the two pieces that it came with.