Warwick Music Group has also developed a plastic trumpet, the pTrumpet, along with a pBone mini for small children.Experts say that children who have early exposure to musical instruments develop areas of the brain that relate to social, language and reasoning skills, as well as memory. Early exposure to an instrument can also help develop a child’s sensory and fine motor skills, encourage self-expression and stimulate creativity.Gareth Haines, managing director of Normans Musical Instruments, which supplies instruments to schools, said that the revival in the fortunes of the trombone and brass instruments as a whole was “remarkable”.“This is an innovation in technology that has had a huge impact – transforming interest in the playing of brass,” he said.“It is re-invigorating the trombone in what is still generally a declining orchestral instrument market and is a great example of how innovation can create greater interest than any ‘play music’ initiative, no matter how important those are.” Liam Kirkman, president of the British Trombone Society, said: “The trombone is notoriously easy to damage – but you can throw pBone across the floor, pick it up and simply play!“The problem we have had in the past is getting youngsters to take an interest. They want the wow factor. Kids need a quick fix – and that’s where the plastic trombone comes in. It is instantlyappealing with its bright colours – far more attractive than being presented with some barnacle encrusted rusty old brass thing.”The pBOne was developed by the Warwick Music Group, who estimate the instrument’s affordability is the reason for a 15 per cent increase on worldwide sales of trombones in the past three years.Steven Greenall, chief executive of Warwick Music Group – and a trombonist since the age of nine – said:“Music should be fun. Children love the colours, the fact that the instrument is lightweight – and that it is not prone to bumps and scrapes. And music teachers love them too. They’re easy to maintain and store. You can carry 20 instruments into a classroom at a time – try doing that with a brass instrument! Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. However, with sales of more than 150,000 since the plastic trombone – called the pBone – was launched in 2010, musicians are talking of a significant revival of the instrument.So popular is the new plastic version, which starts at £125, that even professional musicians, including pop stars, have taken to using it on stage and in recordings.Mumford & Sons used a pBone on stage at Glastonbury in 2013, during a performance of With A Little Help From My Friends; it was used among the backing instruments for Britain’s Got Talent 2016 finalist Wayne Woodward and is played by the US duo Karmin.Jiggs Whigham, conductor of the BBC Big Band, who also played with the Genn Miller Big Band, has also backed the plastic trombone as ideal for beginners.