True, having a baby changes everything.

But the switch is way harder when you’re living on the street, which is why local nonprofit Homeless Prenatal Program is committed to helping down-and-out parents and expectant mothers make changes in their lives.

They offer services like substance abuse counseling, job training, and housing assistance, as well as yoga sessions and eight-week prenatal classes culminating in a baby shower.

And they need your help. Donate new (or like new) mom and baby goods (clothes, diapers, household items) or provide monthly support to a specific family in need.

Because there’s nothing wrong with a little extra mothering.

Homeless Prenatal Program, 2500 18th Street, at Potrero Avenue (415-546-6756 or homelessprenatal.org).

SEE
The SnowCat
What: The heartwarming tale of a little girl’s search for her wandering white kitty on a chilly afternoon set in the heart of San Francisco.
Why: This is one cool cat.
When: Sat., 11 a.m.
Where: Bay Area Discovery Museum, E. Ft. Baker, 557 McReynolds Rd., Sausalito (415-339-3900).

HEAR
18th Annual Home for the Holidays Concert
What: Sing along with the 200-plus men of the San Francisco Gay Men’s Chorus.
Why: It makes the yuletide gay.
When: Tonight, 5, 7 & 9 p.m.
Where: The Castro Theatre, 429 Castro St., at Market St. (415-621-6120).

DO
Ring in the New
What: Craft noisemakers and party hats for the New Year at this drop-in art workshop.
Why: Party like it’s 2008.
When: Sun., 1-4 p.m.
Where: Museum of Children’s Art, 538 9th St., at Clay St., Oakland (510-465-8770).