Beth Gilmour was just 12 when she sketched the green thistle-man with purple hair who has proved a hit with Games fans.
Cuddly Clydes have been the most popular merchandise items and the 15cm (6in) and 25cm (10in) versions have now sold out, with more than 46,000 purchased since the beginning of July.
There are 25 statues of the character dotted around Glasgow, forming the Clyde Trail, which has proved popular with photo-hunting tourists.
Beth, now 14, said: "It's really good to see, I feel like it's my own part of the Games and it's really good to be involved in a such a good thing.
"I love seeing the reaction from people. When I've been out and about and seen Clyde in Glasgow, and seen people running up to get pictures, it's nice to see and I'm quite proud of it.
"I had no idea it would be this popular, none at all. I didn't realise how much it would be used. It's amazing to see the toys.
"It's amazing to see something I did become that successful."
The schoolgirl, who attends Lenzie Academy in East Dunbartonshire, has enjoyed the Games, attending the opening ceremony and netball and gymnastics events.
She has her own mementoes of Clyde in the form of three of the cuddly mascots.
Sales of cuddly Clyde Glasgow 2014 mascots have outstripped T-shirts and badges to become the Games' most popular item of merchandise.
Beth designed Clyde for a Blue Peter competition and her creation was chosen from about 4,000 entries.
Organisers said the main criteria was that the mascot should be both Scottish and Glaswegian.
Since he was unveiled as the face of the Games, he has met thousands of schoolchildren, encouraging them to get involved in sport. He has also met the Duchess of Cambridge and Olympic diver Tom Daley.
Beth's mother, Christine, said: "We never expected it to have the coverage it has had.
"The mascot has been the face of the Games in the build-up and we just feel so proud that we've had a part to play in this.
"We just found it incredible that Beth had this opportunity to be part of it and Glasgow 2014 have involved her in so many things.
"She has had so many opportunities and met so many people through this, it's been so good."