What did Jo decide to do on a cold day in Little Women?

In chapter 5 of the novel the sisters are enduring a snowy afternoon and have been shoveling snow. Meg suggests that the best use of a day like this would be to stay indoors and keep warm by the fire, especially as the girls have already gone for two long walks. However, Jo disagrees—she says that she prefers "adventures" to sitting around next to the fire, and she leaves Meg to her book and goes out to dig paths around the garden. She takes a broom with her and is eventually able to clear a path around the whole area, thinking that it will be good for Beth to have somewhere to walk without stepping in snow.
Jo, however, has an additional motive for going outside—she has been intrigued by the boy next door, Laurie, and chooses this afternoon to throw a snowball at his window and speak to him. This is how Jo and Laurie first begin their acquaintance.