Climbing trees, turning cartwheels and such other children's activity will seem useless to you. It is what animals do and our ancestors did due to necessity of survival. So is apparent gibberish like nursery rhymes. Yet, it is all a part of the learning process. And no kid will be misled into believing that tree climbing can be a well paying profession just because you help in that activity.
Even more important, if 8255 is what he can buy/borrow and get books on then, that is what he will have to learn. Most of my country is still poor, with limited communications and other infrastructure. Unlike a first world kid, most Indians cannot get access to a lot of things. If someone is lending him free ICs and books, or it is all that his college / school has, then he is constrained to learn that.
If you cannot realize this, then there is something seriously wrong with you.
I hate to say this and I may get banned from this forum, so be it. You were not half as rude to Peter Benn for his 8255 post with the title "please help me" as you were to this Indian kid, who had an explicit title "8255 interfacing with SILABS C8051F226". I have noticed you specifically are rude to Indian/ Asian posters. Your attitude smacks of racism to say the least.