We can’t help but be skeptical of products that claim to evolve with our kids. But the munchkins grow so fast we’re willing to give things a try — especially if it means one less item cluttering a landfill.

So when we heard about the new Birds & Bees bottle system, a stainless steel sipper ($24) from Sausalito-based EarthLust that takes your tot from slow flow bottle to sippy, we had to see what the buzz was all about.

From its sturdy plastic bottom to silicone top, everything is BPA free. Thoughtful details include caps with ounce markings, two nipple flow options, and full sippy fittings (spout and easy-grasp handles). All pieces are dishwasher safe, though hand-washing is best to preserve the snazzy artwork.

And, of course, Mother Earth.

Available at Fiddlesticks, 540 Hayes Street (415-565-0508 or shopfiddlesticks.com); Aldea, 3338 17th Street (415-865-9807 or aldeababy.com); Wishbone, 601 Irving Street (415-242-5540 or wishbonesf.com); The Treehouse Green Gifts, 2935 College Avenue, Berkeley (510-204-9292 or treehousegreengifts.com). To see styles, go to birdsandbeesbottles.com.

MAKE
MakeArt Children’s Workshop: Jewelry Design
What: Parents and kids ages 6-12 tour the museum’s contemporary jewelry show then create take-home baubles from recycled materials.
Why: One man’s trash is a kid’s treasure.
When: Sat., 1-3 p.m.
Where: San Francisco Museum of Craft+Design, 550 Sutter St., b/t Powell & Mason Sts. (415-773-0303). Reservations at 415-773-0303. Free.

EXPLORE
Family Explorations of Golden Gate Park
What: In honor of Earth Day, tykes ages 5 and up (and their grown-ups) explore the park with an Academy naturalist.
Why: Local biodiversity, up-close.
When: Sat. & Sun., 9:30-11:30 a.m.
Where: California Academy of Sciences, business entrance, 55 Music Concourse Dr., Golden Gate Park. Reservations at 415-379-8000 or online at calacademy.org. Members, $8; nonmembers, $10.

WATCH
CubaCaribe Festival of Dance and Music Children’s Matinee
What: Local storyteller Muriel Johnson and Carribean diaspora dance troupes from Cuba, Haiti, Mexico, and Oakland perform for tots.
Why: Give them something to sing about.
When: Sun., 3 p.m.
Where: Dance Mission Theater, 3316 24th St. Tickets at 415-273-4633 or online at brownpapertickets.com. Adults, $15; children 12 and under, $10.

Photo: Courtesy of EarthLust