This 4-tier curved vaulting box is an advanced physical fitness tool designed for children aged 3-12. The interior uses a high-resilience composite of EVA and PU foam, balancing support with softness, while the thickened PVC leather exterior ensures a secure grip for hands and feet. The signature curved top is not only ergonomic but also provides a safe, smooth transition if a child loses their balance. The four layers can be stacked or used independently, allowing instructors to customize climbing and jumping paths, making it an ideal choice for kindergartens and sensory gyms.