The third house is the house of the immediate environment, contacts, the house of concrete thinking, primary and secondary education, and short-distance travels. The first thing we want to talk about here is education.
Uranus is the planet of freedom and change. It always brings some jumps. And in terms of education, the person does not have everything evenly. Often with such a position of Uranus, it is difficult for a person to study systematically. In this regard, everything is always erratic. The person himself has a very interesting mindset, he may have some insights, epiphanies, especially if there is an aspect with Mercury. He can think unconventionally and solve problems in an unusual way. And he will learn if he likes it. Therefore, in studies as long as it is interesting, everything is fine, but as the interest disappears, he begins to slide into bad grades, and then the interest arises again and the academic performance grows. Or it happens that the person is inclined towards such Uranian subjects as mathematics, physics, computer science, astronomy. In them, he may be excellent, while in the rest he is neither here nor there. Or in terms of education, the child may change several schools, or teachers may change, or move to other classes. In general, a restless education, but at the same time he very much likes all kinds of inventions and experiments, something interesting and unusual, or an unusual approach to the process. If it hooks him, he will definitely get carried away. And in adulthood, he will with pleasure watch technical innovations, study them. And if a new car model has been released, he will not be able to pass by indifferently without studying it from head to toe. He will know what kind of engine it has, heating, warm-up, ABS, EBD, ABCD and other cool stuff.
Immediate environment... Here the relationships are also uneven. He may communicate on the same wavelength, since it is incredibly interesting to him, then he may suddenly disappear from the field of vision of friends or relatives for several months or years. And then reappear, and we are best friends again, as if there was no gap in between. It's very good if there are Uranus-oriented friends in this space: unusual people with interesting hobbies who are inclined towards something new, who can teach and show something, for example, astrologers. And you don't want to part with such people.
The same thing can also apply to relationships with brothers and sisters. Either it's boring with them, the communication will be in spurts, or they, on the contrary, are very interesting people: engaged in some Uranian activity, or inclined towards mathematics, physics, astronomy, astrology, or they have an unusual fate, or they can stand out in something original.
The person himself can be abrupt in communication, impulsive in his statements.
This third-house space of a person is restless - he may have constant trips, change of residence, travels to exotic places.
The choice of a car, as mentioned above, will rather prefer something new, pumped up with modern electronics. Even if he has an old car, he will upgrade and tune up his car.