The hand-me-down plan works great until the Age of Exploration: Gashed tee climbed a tree; ripped trunks went fishing. For sturdier adventurer’s attire, invest in pieces from Jimin Mannick. The local artist and mom handcrafts a pint-size collection of distinctive threads every six to eight weeks for her indie label, Smallville. Her latest, Sail Ahoy, features embroidered patch pockets, shank buttons, and polka-dot plackets on easy-to-wear fabrics like denim and linen. Durable craftsmanship and unisex styling ensure seamless transfer from sib to sib. Think of them as treasures worth sharing. At any age. Available online at small.bigcartel.com. BUILD Earth Day with PlanToys What: Green company’s elves help tots make mini ecohomes, learn about the three R’s, and win prizes. Why: It’s child’s play. When: Wed., 9 a.m.-noon. Book by 5 p.m. today. Where: Ravenswood Child Development Center, 951 O’Connor St., E. Palo Alto. To reserve your spot, call 650-968-4783 or e-mail email@example.com. HEAR Mom-in-Chief What: Author and mother Jamie Woolf reads from her new book about bringing home more than just the bacon. Why: You’re the reader of the pack. When: Sat., 2 p.m. Where: Book Passage, 51 Tamal Vista Blvd., Corte Madera (415-927-0960). BUY Koze Beginnings Opens What: Waterfront boutique spawns a store next door, offering togs from the likes of Splendid, Minnie Rose, and Michael Stars, plus artisan-made gifts for moms and minis. Why: Make waves. When: Opens Sat., 10 a.m. Where: 18 Main St., nr. Tiburon Blvd., Tiburon (415-435-1916).