Roads, sewers, bridges, even the option to scoff a humble slice of toast – we have a lot to thank civil engineering for. Yet although it has transformed the world around us, its concepts can sometimes be a little tricky to wrap your head around. 

That's where Pitch 200 comes in. An exciting competition from the Institution of Civil Engineers, it challenges engineers’ creativity and invites them to bring to life a civil engineering principle or idea using only their words and everyday objects. The catch? They have just 200 seconds to do it!

From digestive biscuits to Jenga, get ready for a shed-load of fascinating information to enter your brain in a somewhat... unusual way. But which pitch takes the proverbial biscuit and which runs smoother than a London sewer? That's up to you! Here are a selection of our favourites, but make sure to click through, watch all eight finalists and vote for your favourite video.