I am a little baffled by some of the 'info' in these responses....
First off, to say that its okay to let a first time pet owner have an animal because it is less expensive..or less intelligent than another type because it will be easier for you to 'replace it' and to justify its death is disgusting! Pet ownership shouldn't be based on how much you can afford to spend 'replacing' the animal after it dies--if it is properly taken care of in the first place IT SHOULDN'T DIE prematurely.
ALL animals no matter what their size or intelligence level REQUIRE a DEDICATED owner. Is the child in question actually wanting a pet? Have YOU spoken to this child about his desires of pet ownership, or what HE is interested in? There is no use in getting him a pet that he will not be able to take care of, or that his PARENTS will not want to take care of once/ or IF he gets bored.
All birds make some level of noise, they all make a HUGE mess with their seeds, they can all be trained to be handled, they all have different flock social structures, and all require ample space.-- FINCHES especially need LOTS of space to fly, they are designed for long distance flight. Zebras in the wild will fly 15-30 miles a day between water holes and feeding grounds (in captivity they are lucky to fly 24 inches one way).Where as parrots, and the like, are designed for climbing through the trees to forage... Parrots, Parrotlets, Cockatiels, Parakeets, would all be far easier to house because they don't require alot of floor space-- and they LOVE interaction with their human flock.. the cage can basically be the birds 'bedroom' and can have full roam of your house, a spare room, and any 'jungle gyms' that you can image to make/buy to extend/expand on your birds 'houseing'..
Finches, on the other hand are small. Easily startled, and generally do not want to be held, and HATE being stared at. BUT they do require a flight cage, 24" is the MINIMUM length for a PAIR (2) zebra finches. Zebras need other members of their species to keep them happy. It is possible to house same sex pairs together--but just like some other animals.. alot of times when two males are together they will and do fight. Fighting doesn't always involve feather plucking..it can include mounting behavior, intimidating, chasing.. and other behaviors that create stress.. stress is a major killer of small birds. Males and females can be housed together, and guess what.. if you don't want them to breed..do NOT include a nest in their cage. Some birds will get inventive and use a feed dish as a nest, simply remove the eggs if they do...Zebras form very strong bonds with their mates, and are delightful to watch.
On the whole-- Finches are more economical for a teenager and his parents.. their feed is cheaper, their supplies and cage setup is cheaper, and if the child decides he is just too busy to handle his birds--no worries, they don't like being held anyway.
Hookbills are HIGHLY social, like some one else mentioned they are like having a small child (a child perpetually trapped in its terrible twos) if he gets busy with school, a girl friend, sports, or whatever..the parrot will ultimately suffer, and may become aggressive (no one likes to be bit!) which in turn will result in the bird getting rehomed because the inexperienced owner will most likely NOT want to brave the screaming and bitting to get his friend back.--I can not tell you how many birds I have rescued and rehabilitated for aggression because their owners weren't compitent enough to consider the mental health of their parrot.
Also ALL hookbills will 'flock call' if they become attatched to their owner and he leaves the room--if he lives in an apartment, are his neighbors going to want to hear this ALL day while he is at school?
When I was 13 I had two pairs of Zebras in my room, and their soft 'mechanical' beeps drove my mom nuts--she said it sounded like a scratchy record....luckily for my birds I worked for all their feed and care--so my mom was willing to endure the noise as long as I was taking care of them.
Bottom line-- pets are a TERRIBLE gift, if the Boy is willing to work to buy/help earn supplies for his new pet and his parents are just as excited to welcome a bird into the home...THEN I think you have a winner; such action would indicate that he is truly interested in having a bird as a pet. Talk to him about HIS interests and see what HE wants (don't forget the parents, have them research these birds too so that they are familiar with their care). Then help guide him, this will require BOTH of you to do some internet searching-- learning about where the birds are naturally from, their care requirements, cage space, intereaction needs-- this will help him make one of his first grown-up responsible decisions, and feel closer to his pet since he will know what he is in for (as far as ownership is concerned).
** Conures are not a good choice for a first time bird owner.. they can be difficult. Cockatiels are good pets, but also require a great deal of interaction to keep them from becoming ''mean''.. Parakeets are very cute, small, colorful, require less space than the other two hookbills..but again-- require a dedicated owner to keep them happy. Ultimately the choice is going to fall on how dedicated, and how much TIME this boy wants to dedicate to his pet for the next 10-20 years of his BIRDS life...OR if you are willing to take the bird if he finds he is unpreppared to take care of it.