Nightly bumps on the head and Kiwi ingenuity inspired a Devonport-based mum to create her own solution to her children's bet-wetting.
The Brolly Sheet was Diane Hurford's brain-child - they are breathable, waterproof sheets that go over the top of normal bedding to protect it from late night toilet-training accidents.
When creating the Brolly Sheet, Hurford said not only were other options on the market too expensive but looked "too sterile" as well, so she made them in colours complementary to children's décor. Lime, blue, red, white and pink Brolly Sheets are all available.
They're an invention Hurford is not only selling for children, with seniors and the disabled community snapping them up too.
"If you're buying them for your children you can buy a couple - two or three - and that will do all your children and then you don't need them anymore," she said.
"With the seniors and the long-term disability market is it more long term and so it's repeat purchases."
Exported now to Australia and the UK, Brolley Sheets will soon be hitting the US.
"We decided to stay with the name brolly to make our brand stronger and on our website we have an explanation about where the word comes from", she told TV ONE's Breakfast.
"We decided not to change the name to something American and hopefully it becomes a strong enough feature over there."
Last year the company Hurford created to sell them, also called Brolly Sheets, was dubbed by Deloitte as one of the country's fastest growing companies, with an annual growth of almost 300%.
Brolly Sheets, with a tagline of "big solutions for wee
problems", now makes over 10 products including pillow protectors,
bed pads and chair pads.