Boxes with Lily Campbell's design will soon be available across Canada. (CBC)

Louise Campbell always liked her young daughter Lily's painting, and thought it looked great on a tissue box, but never imagined when it was entered in a national contest that it would take top prize.

Louise Campbell, of Charlottetown, and Lily, now 5, recently learned the painting the youngster created two years ago won first prize — which includes a $25,000 room makeover — in a national challenge by Scotties looking for new tissue-box designs.

"I jumped up and down," said Lily, reacting to the news she beat out thousands of other entrants.

Lily's design will also be produced on tissue boxes sold in stores across Canada.

Going to the Scotties website to read about the contest was a bit of a whim.

"You could actually upload the picture and as soon as you uploaded it, it showed you what it would look like on a tissue box," said Louise Campbell.

"It looks good on a tissue box, so we were like, 'We've got to do this.'"

Lily Campbell said she jumped up and down when she heard she had won the $25,000 top prize. (CBC)

This summer, Scotties narrowed the thousands of entries down to 70, which went to an online vote. That Lily's painting made the first cut was surprise enough, but considering the realities of online voting, Campbell was sure her daughter had no chance.

"You know, people have vast networks," she said.

"We literally sent it to 10 people and said, 'You know, if you don't mind, but don't feel you have to.' So we never ever once thought we would be the winner."

Campbell said the best part of the prize is the pride in her daughter's artwork, but there is also a material aspect: the $25,000 room makeover, which will go into redoing her kitchen.

While only a few people were asked to help with the voting, Campbell said a much larger kitchen party is being planned once the makeover is complete.