Christmas helps a lt in the beginning. Lots of decorations, lights, Christmas music, movies etc. we keep it up long after Christmas.
Snow is fun. We build snowmen, snow forts, snowball fights and winters hikes.
We try to get as much sun exposure as possible. It's very snowy and gray here so we try to get outside if there's a glimmer of sun.
We also have a "sun light". Very helpful. We burn lights day and night indoors and choose very warm spectrum lights to counter the gray.
We play lots of indoor games and run and scream a lot. We have a rule in our house that until evening, children should be heard and we chase them and have them scream and play.
We,play lots of upbeat music...dance music and dance. Moving helps.
We watch funny movies.
We also have lots of lessons and games and reading.