It appears my kids get very expressive at about this age. I think it is teething faces. Last night Joy was particularly fussy and wouldn't take a pacifier. She was fussing so my mom and I were playing with her patting our hand on her mouth making the "wa wa wa" sound when she cried - this usually makes her laugh but I guess she didn't want to laugh so she shut her mouth tight and gave us funny faces. I grabbed the camera and snapped some pics and these are what I got.