Tension structure is a kind of magical structure. We will try to explain this principle clearly in three modes: 1. Cut the rope: You need to try to cut the excess rope in the already balanced structure and keep the balance of the model; 2. Connect the rope: In this mode, you need to adjust the angle of the model, and reproduce the necessary rope connection according to your own understanding, and then ensure that the model can be balanced under gravity. 3. Challenge: In this mode, you can use your imagination to challenge the different answers of these models. This is like life, there is no right or wrong, the most suitable is the best. This is just a game, it is enough to bring you some happiness and fun. I hope you download this product because you like it and not because you are bored.