Your simple paper helicopter is now ready to take flight — and it’s more than just a fun craft, it’s a mini physics experiment in motion! Start with an A5 sheet and trim off about a quarter from the top — this gives you the right balance between size and weight. Vertically divide the top half into two sections (these will become your rotor blades) and the bottom half into three equal strips. Make sure to leave a 1 cm gap between your cuts so everything stays connected. Now, fold the two lower si