Assemble the sockets of the three propellers upwards, put the balloon on the plastic tube, blow up and pinch the balloon. Then put the propeller tee tightly on the blue plastic tube, then clamp the balloon helicopter and let it fly on the horizontal plane, and then you can fly upwards. It can fly several meters high, and it makes a pleasant whistle sound during the flight. Specific operation: Assemble the sockets of the three propellers upwards, blow the balloon on the blue plastic tube and pinch the balloon, then put the propeller tee tightly on the blue plastic tube, and then clamp the balloon helicopter and the horizontal plane Let go and fly, then you can fly upwards, you can fly a few meters high, and make a pleasant whistle sound during the flight. It is easy to assemble and suitable for children aged 3-5. It is the best educational toy for children. Colour: random color, don't accept the specified color Material: plastic Size: Fan blades: 3.7cmx13.0cm Package Contents: 20 * Balloon 30 * Air blade 10 * Connector 10 * Air nozzle Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.