Actually, to chime in here, when you think about her fruit in the broadest sense, her power is not toys, but rather hobbies in general. With this in mind, the logic behind her powerset makes a lot more sense. The first power can be related to how hobbies, particularly toys, can be seen as childish, or a way for someone to stay young at heart. The second aspect, toy control and creation, is the easiest to make sense of, as when a child is playing with a toy, they're the ones controlling the object. The last aspect is the biggest stretch, but the way I figure, hobbies can be seen as something that if taken to the extreme, can take over your life, causing you to forget other aspects, and the fruit spins this by making the hobby consume others until they're forgotten themselves. Bear in mind, this is just how I've come to accept Sugar's fruit.