Weekend readers' in pictures: Invention

Andrew Hill “The combination of electricity and a light bulb lit the way for so many, and I wouldn’t be surprised if this was one of Mr Edison’s first batch” Photograph: Andrew Hill

Ciara Leeming “I couldn’t help thinking that this chicken taxi I passed in Kolkata was an ingenious, if left-field, invention” Photograph: Ciara Leeming

Gael Allan “Bridge and railway, Bristol – need I say more?” Photograph: Gael Allan

Amy Fern "In the age of digital technology I was inspired to take this photograph of one of the greatest inventions of mankind: the book" Photograph: Amy Fern

Habie Schwarz "Wouldn't it be great if we had NOT invented money?" Photograph: Habie Schwarz

Hayley Easton-Street "In Botswana, while out driving we saw these two boys playing. The older boy had made a replica of a jeep out of wire with tin cans for wheels - it was a perfect working model" Photograph: Hayley Easton-Street

Howard Marsh "This chimney in Maidstone which is illuminated at night reminds me of the industrial revolution and the might of British industry" Photograph: Howard Marsh

Jane Whitehead "Quito, Ecuador: I liked the fact that this man (who should be retired) had invented his own version of a mobile ice cream unit" Photograph: Jane Whitehead

Martin Thomas "This was one of several ingenious wind machines I spotted while walking along Brighton seafront. Some of the machines flapped, some rotated, and some, like this one, flapped, rotated and blew bubbles" Photograph: Martin Thomas

Nita Schelp "I was allowing myself to get a bit lost, walking around London for the first time, and coming along the Thames from Chelsea suddenly saw this enormous power station, remnants of an inventive bygone era" Photograph: Nita Schelp

Rod Olukoya "I'd never seen anything like it. I found this invention whilst walking the streets of Bangkok. This could also double as a wedding carriage" Photograph: Rod Olukoya

Tim Johnston "Necessity certainly was the Mother of Invention for this pig I came across while hiking in the Swiss Alps. It was early morning and quite chilly, this poor pig was so cold it was shivering and had snuggled up to the cow for some warmth" Photograph: Tim Johnston