Harvesting my crop before I have frozen lemonade

My plants have already been covered with frost clothes since the temperature has dipped at night. However, I had to pull it back and go ahead and pick some of my lemons before I have frozen lemons.

This year's crop brought 14 lemons. I'll give mom a few, but I doubt either of us will do more than put them in a bowl as decoration. They are kind of sour for lemonade. I grow them just because I like to claim to grow stuff like lemons. 

That's not as cool as growing pineapples, but part of my pineapple plants froze last winter, so the plants that are left aren't mature enough.