Tis’ the season for snot rockets and scratchy throats.Pediatrician Louis Borgenicht and local dad Joe Borgenicht, co-authors of The Baby Owner’s Manual, have a few tips for keeping Junior in tip-top shape.Toy HazardWatch out for playthings that never get cleaned; they’re loaded with bacteria.Homeward BoundWith all the germs floating around the doctor’s office, resist the urge to rush Baby in at the first little sniffle. If you’re worried, make a call beforehand.Patience Is a VirtueEven with modern medicine, most childhood illnesses just need to run their course without the help of antibiotics.Real SimpleDon’t underestimate the basics. Hand washing and eating well are key to staying healthy.And that’s nothing to sneeze at.DOTu B’Shevat Family Day What: Celebrate the Jewish New Year of Trees with leafy activities and a seedling of your very own to take home.Why: Branch out.When: Sun., 1-3 p.m.Where: Morris Arboretum, 100 E. Northwestern Ave. (215-247-5777). SIGN UPPuppeteering ClassesWhat: An eight-week workshop in which kids (7 years and up) create a puppet show.Why: No strings attached.When: Classes begin Sat., noon-3 p.m. Where: Plays and Players Theater, 1714 Delancey Pl. (215-735-0630). Registration required.STRETCHMommy/Daddy and Me YogaWhat: Enjoy an invigorating session appropriate for all ages.Why: Child’s pose.When: Ongoing. Mon., 9-10 a.m.; Thurs., 3:30-4:30 p.m.Where: Inner Bliss Yoga, at City Fitness, 200 Spring Garden St. (267-236-2783).