You can do this too, by going to this link and following these simple directions. You can download these as well.
As you can see from the photo on the left, I used some old plywood to make mine. I did wash it a few days ago, since it had some winter crud-sludge on the board, which I didn't want in my hive.
I use this product (there are others out there like it) to add a boost to my bees during the winter months.
The directions on our site also recommend adding a pollen patty, which I did on the candy board shown above.
Again, during the few warm days you will get from time-to-time this winter, have these ready to go so you can pop these onto the hives on those days.
Until next time, see you around the hive.