Hazel | Pikler Triangle, Slide & Rocker SetWhy Its Worth the Investment Investing in a quality wooden Pikler triangle set supports your childs developmental play. Hazel is crafted from premium wood featuring smooth, rounded edges and a modular design that adapts over timewhether you add a slide or utilize the ramp. More than just a climbing ladder, its a long term play structure thats safe, durable, and sparks imaginative exploration. Ages and Stages of Play Our Pikler triangle sets are