Modular Slide Apparatus and System

A modular slide for use on a staircase includes at least a first slide module with an entry section having an entry surface defining a seat and a gripping surface substantially opposite the entry surface. The modular slide also has a ramp section with an elongated surface extending from the entry section towards a terminal end of the ramp section, an underside being configured to rest upon portions of the staircase, and two opposing sidewalls spanning both the ramp section and the entry section and having an upper edge defining a handrail. An identical second slide module is configured to overlap and integrate with an upper portion of the first slide module to form a continuous slide surface and a continuous handrail of an extended modular slide.