Lancaster musician and comedian Kriss Foster will be on hand over the weekend to let you have a go on his unique instrument.
The Guppy, named after its creator Paul Guppy, is part guitar, part ukelele, and will be on display at the Music Spot in Great John Street over the weekend, where you can hear a demonstration or even have a go yourself.
It is thought to be the only one of its kind in the world.
On Saturday there will be music from The Thyme Machine and Stephen Hudson, as well as performances from Music Spot students, teachers and regular customers.
Independent music shop Atticus Accordions, in King Street, will also be hosting performances, from 1pm until around 6pm on Saturday afternoon.