How do you exercise your puppy when the weather is unusually bad?

So my city is having really strange weather for the season right now. It’s REALLY cold and we might even get snow.

My puppy has really fine fur right now and gets cold very easily. I’ve tried bundling her up but she’s always still cold.

How can I give her enough exercise in the house and make sure she doesn’t get too bored?

How much exercise should a six month old labrador puppy get?

Right now she goes on one walk a day, and p,ays fetch and runs around the backyard about twice a day for 10 minutes. I know too much or too little exercise is bad for your puppy, so I am just wondering if this is enoughj, too little, or too much? Thankss!