When it comes to baby fashion, the words “gender neutral” are code for “subtle pea green” (nothing to envy about that).Make the case for simple white instead. To wit: Oeuf’s new baby layette.The modern kiddie brand — known for clean lines and eco-conscious design — delivers a selection of baby basics that lives up to its reputation. The entire collection — from beanies to blankets — is made under fair trade conditions in certified organic Peruvian cotton.Items come in sizes 3 to 24 months and include kimono-style onesies and tees, jumpers with and without feet, long- and short-sleeve tees, pants, and ruffled diaper covers. No need to fear baby blowouts; nothing takes a splash of bleach quite like an all-white wardrobe.Perfect for your blank canvas.Available online at oeufnyc.com, $12-$56.Photo: Courtesy of Oeuf SOARFamily Day: Up, Up, and AwayWhat: Watch Joe Mangrum create site-specific sand art, partake in crafts, and learn gravity-defying dance moves from Holly Bass. Why: Everyone gets a kick out of Claire Healy and Sean Cordeiro’s installations — bet you never thought there would be cheese balls and Legos inside the Corcoran Gallery of Art. When: Sat., 10 a.m.-4 p.m.Where: 500 17th St. NW (202-639-1700). Admission is free.RAPP. NokioWhat: G. Petto creates a video game boy who’s tempted by the dark side (ages 4 and up). Why: No strings attached. When: Thru Mar. 11.Where: Imagination Stage, Lerner Family Theatre, 4908 Auburn Ave., Bethesda. Tickets at 301-280-1660 or online at tickets.imaginationstage.org. Adults and children, $10-$22; lap seats for babies, $5.FIND OUTWhat Was the Lorax?What: Listen to the Dr. Seuss tale and take a truffula seed to sprout at home. Why: Nosh on free cupcakes in honor of the iconic author’s birthday. When: Sat., 10 a.m.Where: Irvine Nature Center, 11201 Garrison Forest Rd., Owings Mills (443-738-9200). To preregister (recommended), call 443-738-9224. Adults, free; children, $10.