From a blog that I regularly read:
"At least some of the kids, were really pleased with their results."
Wrong!! Incorrect use of a comma!
"Using our breath to blow the paint across the page making interesting patterns and color combinations."
Wrong!! Incomplete sentence!
"My guinea pigs two 8 year olds and two 6 year olds, were unable to lightly drip the paint from their cupcake liner papers."
Wrong!! Incorrect use of a comma! Poorly constructed sentence! Not even interesting!
You may now take your seat.