Elin Jervis and Sophia Eagle hope to raise hundreds of pounds for Unique, in support of Elin's little sister, Charlotte, who has a rare chromosome disorder – one that is so rare it doesn’t have a name.
Elin, 10, said: "We are going to stay silent for 12 hours each from 8am to 8pm on Saturday 6 February. This will be difficult for us as we are not used to being silent for so long!"
Sophia, nine, added: "We had wanted to do a bake sale, but had to cancel twice due to lockdown, so we are going to try stay silent instead. At the end, we are going to break our silence by hopping into a cold bath and screaming!"
Sophia's mum Sue Eagle, a commissioner with the City of Wolverhampton Council, said: "We are so proud of both girls. Our families have been friends since the girls met at nursery, so Charlotte has always been a part of our life.
“Unique were the only charity that could support Charlotte and her family once she received her diagnosis.
"We thought people might struggle to donate, but we have been overwhelmed by the response and their generosity, which I know will be gratefully appreciated by Unique.”
Although the pair, who are both in Year 5 at The Royal School, have already exceeded their initial target, they want to raise as much as they can while also raising awareness of the charity.
Sue added: "All charities are struggling, but smaller charities like Unique are particularly struggling due to a lack of fundraising opportunities because of the Covid-19 pandemic so we feel it’s even more important to support them at this time."
People can make a donation at Elin and Sophia's JustGiving page.
Unique helps provide information and support around chromosome and genetic disorders, and connects families in similar situations. To find out more, please visit Unique.