Two young brothers from March raised £600 and "made nanny proud" by completing a paddle boarding challenge.
Ronnie, aged 10, and Albert, eight, took on the fundraiser at Houghton Mill, Huntingdon on June 29.
Their mum, Leigh Monk, said: "They raised £600 for Multiple Sclerosis (MS) Society in memory of their beloved nan, Pat Loughton, who passed away September 2023.
"The boys came up with the idea themselves after finding her loss challenging and wishing to give something back."
The pair completed 10 laps, which was five-miles-around on their paddle boards, supported by their dad, Matt.
It took them two hours and 57 minutes, which was just under their target of three hours.
Leigh added: "The boys made nanny Birdy proud and had lots of family and friends come to cheer them on.
"Albert said to Ronnie as they were getting close to the end and getting tired 'it doesn't matter if it hurts, nanny was in pain all day every day'."
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