Iron roof, glass walls, burns and burns and never falls.

Why this works

This riddle describes a lantern (or an oven) through clever imagery and wordplay. The "iron roof" refers to the metal top of a lantern or oven, which is often made of iron or similar materials, while "glass walls" highlight the transparent sides that let light through. The phrase "burns and burns" indicates that both a lantern and an oven produce heat or light from a flame, and they do so continuously without collapsing or falling apart. This delightful riddle plays on the physical characteristics of these objects while evoking their function, making you think creatively about everyday items!