Teenager Nick Cottreau is a model engineer in the making - after building this staggering 25,000-piece 'roller coaster' in his bedroom.
The 16-year-old spent more than six months making the sprawling machine made entirely from K'Nex in his room in Nova Scotia, Canada.
His incredible 'roller coaster' style creation takes around seven minutes to complete and features numerous lifts, drops, spins and loops which keep the balls moving around the track.
The fascination and obsession to build mammoth models started when Nick received his first K'Nex set at the age of five.
Nick said: 'Sometimes I would work on it every day for a week, sometimes I would not touch it for more than two weeks.
'When I did work on it was either for just a short amount of time or sometimes I would spend an entire day building and planning.
'I'm lucky that the majority of the pieces used in the build were gifts for Christmas or my birthday, but if I were to buy all of the pieces new it would cost in excess of £2000.
K'Nex is a construction toy invented by Joel Glickman that is designed and produced in Pennsylvania, USA.
In total, Nick, 16, has more than 37,000 pieces of K'Nex and constantly spends his spare time planning out new and more extravagant designs.
Nick added: 'My friends and family are all generally quite impressed with the machines and find it amazing that I can build stuff as complex as they are.
'It's interesting to watch people's reactions that haven't seen my machines in a while, they forget how big and intricate it is.
'I've already planed out most of my current machine and I already have a support plan for my next machine.'