Final answer:
Magic items can be activated in various ways, including through words, rituals, or simply by touching them. The referenced examples are not related to magic item activation.
Step-by-step explanation:
When it comes to activating a magic item, methods can vary depending on the item itself and the magical system in question. While saying a magical word, waving a wand, or performing a ritual are common in fictional tales, in reality, the activation of a magic item can be as simple as touching it. For example, a magical ring might be activated by simply wearing it, or a magic staff might be activated by holding it.
In the referenced examples, a person striking a hammer against a hard surface and a person blowing through a small slit in a wide, stretched rubber band are not related to the activation of magical items. They are simply actions unrelated to magic.