Lamp-work has a long history. The earliest verifiable lamp-worked glass is a collection of beads thought to date back to the 5th century. 
Lamp-working became widely practiced in Murano, Italy in the 14th century. Lamp-working differs from glassblowing where a furnace is used as the primary heat source, although torches can also be used.

Lamp-working is a type of glasswork where a single torch or flame is used to melt glass. This technique uses glass rods that, when heated in a flame, become soft and can be manipulated into the desired shape.

It is also known as flame working or torch working, as the modern practice no longer uses oil-fueled lamps, which were used years ago with foot-powered bellows; today, gas-fueled torches are used.

Lamp-working is used to create jewelry including beads, artwork, figurines, marbles, Christmas tree ornaments, and much more. 
There are no limits to the creativity of the flame.