Master Builder - Roller Coaster Marble Run - Construct Your Own Huge Marble Run - Out Of Paper!

Build your very own ROLLER COASTER MARBLE RUN completely from this book! Press out the pieces, assemble your roller coaster and watch as your structure grows. Then race marbles from two starting points and see which marble comes out first!

With extra information about the science behind your build, this book will keep master builders entertained for hours.