WA Mums' Cottage is bringing the Mandurah Ukulele festival to the foreshore from 17-18 April.
WA Mums Cottage is an organisation which seeks to provide a safe space for women and children and assist those who experience distress or family violence.
Chairperson Kaye Seeber said the event will raise funds for the cottage.
"We rely heavily on community funding," Ms Seeber said. "This event is the perfect opportunity for people to find out about WA Mums Cottage and at the same time have fun with their children."
The event will span the foreshore from Mandurah central to the marina, with ukulele players from across the state taking part.
"The ukulele is such a happy little instrument," Ms Seeber said. "It's easy to strum and sing along and have a go at something new."
Ms Seeber said the group first approached David Templeman, the minister for arts and culture, with the event idea.
"David was all for it. So we contacted City of Mandurah, and then the WA ukulele network to gauge interest," she said.
"The support we received was beyond our imagination. We have people coming from north and south. From Kalamunda and Hillary's to local performers."
Ms Seeber said the event will run like a "trail of entertainment".
"People can wander along the foreshore and be entertained while taking advantage of the wonderful businesses in the city centre," she said.
St Monica's house at Mandurah Catholic College has chosen WA Mums Cottage as their mission project, and students will be volunteering to help at the event.
"Get a group together - bring your ukulele and join in. Strum along and sing along and just enjoy it without being conscious of being 'good enough'."
WA Mums Cottage volunteers will also be at the event wearing red hats collecting gold coin donations.