3-6 years old is a critical period for children's healthy physical and mental development, and it is also the basic period for developing good behavior habits. Children are curious, like to be lively, young and ignorant, lack safety awareness and necessary safety common sense, and often do things improperly. Especially some bold and lively children like to climb balconies and windows, which is easy to cause safety problems. So what? First, it is clear that parents of young children should educate their children: do not climb trees, walls, balconies and windows at ordinary times, and always pay attention to safety. Trees, walls, balconies and windows are too high from the ground, so it is dangerous to climb. Tell the children not to go out from the window probe, let alone climb the window. It is very dangerous if you fall to the ground from the balcony window. Either you leave your disability or you die. Be careful.