This season marks the 21st installment of Mary Ping’s experimental apparel-and-accessories label Slow and Steady Wins the Race, and the designer will be celebrating the occasion in style this Fashion Week. Ping creates a limited-edition apparel-and-accessories collection of between five and ten pieces for the brand several times a year (only 100 of each item are made), and the fall 2009 line is her seminal 21st. From February 13 through 20, she’s turning Soho design boutique Kiosk into the kind of kitschy, over-the-top birthday party that makes us nostalgic for childhood. The installation will feature a recurring circle theme, with 21 piñatas displayed on a spiral shelf and 21 silver, 36-inch Mylar balloons covering the ceiling. (Press invitations were printed on smaller versions of the reflective balloons.) Six of the papier-mâché piñatas were custom-made by Ping — in festive forms like a hot-air balloon, a shopping bag, a pyramid, and the number "21," pictured — and will be filled with different accessories and gifts symbolizing time, like watches and plant seeds. (Take one home for around $100.) Finally, our favorite part: 21 flowery birthday cakes will be scattered around the store from Fay Da Bakery in Chinatown, La Antioquena Bakery in Queens, and Carvel. The installation will be open to the public starting February 14, for those in need of a Fashion Week (okay, or Valentine’s Day) pick-me-up.

Kiosk, 95 Spring St., nr. Broadway; 212-226-8601.