You need to run out in the middle of the day in the middle of the week — and at a moment’s notice. Where is that Mary Poppins?

KinderExpress fills in when other sitters turn you down. (Who babysits for an hour, anyway?) Founded by mother of two Adriana Scholz, the center accepts children ages 6 weeks to 10 years for four hours or less.

Drop in 8:30 a.m. to 6 p.m. and your child can play with other kids and enjoy games and books in a bright play space supervised by CPR-trained staff. And every first Saturday of the month is Parent’s Night Out, when the center is open 5 to 9 p.m.

Supercalifragilisticexpialidocious.

KinderExpress, 366 Moody Street, Waltham (781-893-0616 or kinderexpress.com).

SEARCH
Chinese New Year Gallery Exploration
What: Hunt through the museum to find the twelve animals of the Chinese zodiac.
Why: It’s in the stars.
When: Fri.-Feb. 1. Daily, 9 a.m.-5 p.m.
Where: Harvard Museum of Natural History, 26 Oxford St., Cambridge (617-495-3045).

SEE
Jenny the Juggler
What: Enjoy juggling, magic tricks, music, and songs from this charming entertainer (and mom).
Why: She’s on the ball.
When: Sat., 10:30 a.m.
Where: The Regent Theatre, 7 Medford St., Arlington (781-646-4849).

TREK
Weekend Snowshoeing
What: Explore nature trails on your own or with a guide; snowshoes provided.
Why: Take a hike.
When: Sat. & Sun., 11 a.m.-3 p.m. Guided walk at noon.
Where: Boston Nature Center, 500 Walk Hill St., Mattapan (617-983-8500).