so I'm looking to be active, I have a 18 month old, and it's hard in the winter because well, it's…

so I'm looking to be active, I have a 18 month old, and it's hard in the winter because well, it's snowing and I wanna go walk somewhere. it's in the low 20s and high 10s here, and I can't think about taking him out side in that temperature. so does anyone have any ideas to getting active around the house?