Abstract: Apparatus (300) for use in a children's playground comprises a rigid ground-mountable frame (301) and at least one chain (302) having an end attached to the frame (301), and is characterized in that the at least one chain (302) is a chain (2) embedded in a resilient polymeric material (3) and the disposition of the links (4) of the chain (2) is such as to permit the chain (2) and polymeric material (3) structure to stretch resiliently under load.A safety structure (20) for use as a safety net comprises a web of resilient polymeric material (21), and is characterized in that chains (22, 23) are embedded in the polymeric material (21), the disposition of the links (27) of the chains (22, 23) being such as to permit the structure to stretch resiliently under load.