I guess in the third panel: Chibi-Miku decided to take off her gloves too? And C-Miku always could just use Leeks for the snowman's arms. They'd match his color at least. X3
Wait... How are those snow-ponytails staying attached? Oh right, Minami physics. X3
The part I like the best about this is the mini-electrical diagram in her lightbulb word balloon, showing the battery connecting to it and back. It's a small bit of geekery and I have no idea why it's there, but I find it strange and amusing.