Check out this cool art series by Lowell, Massachusetts artist and writer Isaiah Stephens. He calls it All Grown Up, and it features several popular young cartoon characters reimagined as adults. We've got Pokemon, Power Puff Girls, South Park, Dexter's Laboratory, Doug, Kim Possible, The Wild Thornberrys, Recess, and Hey Arnold. It's kind of fun to see what these characters might look like had they aged like the rest of us.