Naturally Playful Playhouse Climber & Swing Extension ships free ($29.99 value) with coupon code S2PCFS412 at checkout. Plus, it’s on sale for $549.99 (reg. $599.99). This offer is valid for US shipments only (to the 48 contiguous US states). Coupon code expires at 11:59PM ET on April 16, 2012. Sign up for the Step2 Birthday Club and special emails.