Spothlight : Of, By And For The Children : Soak Up Some Valuable knowledge About Water on PBS’ ‘3-2-1’ Special

Did you ever wonder where our water comes from? Curious about what exactly happens after you flush the toilet? Did you know that the water we drink today is actually the same water the dinosaurs drank?

Fascinating facts about our precious non-renewable resource wash up in A 3-2-1 Contact Extra: Down the Drain, an upbeat, informative program about a serious environmental issue. Hosted by 14-year-old Stephanie Yu, the program stresses the need for conservation-we can’t make more H20, so we need to take care of the stuff we’ve got. You’ll learn that the average American directly uses 120 gallons of water a day; why almost every piece of litter on a city street eventually ends up in the ocean, and how draining motor oil in your backyard damages the water supply. The show will also visit a water treatment plant.

“A 3-2-1 Contact Extra: Down the Drain,” Monday at 9 a.m. KOCE and Friday at 2:30 p.m. KCET. For 8- to 12-year-olds and their families

MORE KIDSU SHOWS

Harry and the Hendersons (Sundays at 6 p.m. KTTV) is a new Fox series based on the 1987 movie about a Bigfoot-like creature who moves in with a suburban family. For all ages.

That lovable loser Charlie Brown returns in a pair of back-to-back animated features. Bon Voyage, Charlie Brown! (Sunday at 6 p.m. KCOP) finds the Peanuts gang traveling to France to be exchange students. Race for Your Life, Charlie Brown (Sunday at 7:30 p.m. KCOP) revolves around a raft race at summer camp. For all ages.

Future Jim Everetts, Joe Montanas and Bo Jacksons vied at the Pop Warner Football National Championships on Dec. 8 in Mountain View. An exclusive special featuring highlights of the eighth annual event (Sunday at 3 p.m. Nickelodeon) features teams selected from all 50 states on the basis of their winning records and scholastic performance. For all ages.

Never mind that dinosaurs and humans didn’t exist on Earth at the same time: Stanley and the Dinosaurs (Tuesday at 11:30 a.m. the Disney Channel) is a clay-animated special that finds them living together quite peacefully, thank you. For 2- to 11-year-olds.

Single-named host Jennifer tackles the drug problem in Youthquake: Beyond Addictions (Tuesday at 8 p.m., Friday at 5 p.m. and Saturday at 11 a.m. USA), which features interviews with addicts and their friends and relatives, as well as visits to treatment centers. For 12- to 18-year-olds.

In the 1990s, 10 million children will graduate from school without adequate skills for work or higher education. All Our Children With Bill Moyers (Wednesday at 8 p.m. KOCE, KCET; 9 p.m. KVCR), which kicks off public TV’s outreach program during “The Year of the Family,” looks at workable solutions. For parents.

Pull up a tuffet and enjoy classic nursery rhymes set to contemporary music in Baby’s Nursery Rhymes (Friday at 11:30 a.m. the Disney Channel). Phylicia Rashad of “The Cosby Show” sings favorites including “Humpty Dumpty,” “Mary Had a Little Lamb” and “Sing a Song of Sixpence.” For 2- to 5-year-olds.

An episode of By the Year 2000 (Friday at 9 p.m. and Saturday at 3 p.m. KCET) discusses whether teen-agers are changing their sexual and drug-related behavior in the age of AIDS. For teens and their parents.

The short film You Don’t Have to Die (Friday at 7 a.m. HBO) won a 1989 Academy Award for its treatment of a scary topic. Narrated by Jason Gaes, who battled cancer when he was 8, the special talks about how he and his family dealt with his disease. For children and their parents.

Two things separate Rhymes and Reasons (Saturday-early Sunday-at midnight KOCE) from your average anti-drug drama for young teens. The first is that it includes music to help tell the stories of three young people who got involved with drugs. The second is its unusually late time slot-set your VCR, maybe? For 11-to 16-year-olds.