Ah, well with those further details I'd suggest getting half a dozen silkies, fully grown hens. Kids love them, they lay but not quite as much, so the few extra will be handy, they go clucky and raise chicks 'at the drop of a hat' so you could get fertile eggs and put them under her for the kids to enjoy some chicks.
Thing is, that chicks take 6 months to grow, by which time half are roosters, so 12 chicks equates to 6 chooks plus 6 months waiting. In 6 months, it is too easy to find out who wants some of your chickens / half grown chickens, so by the time they are almost ready to lay you can sell, trade, or probably already have. Often 2 or 3 dozen chicks can equate to only the bare minimum you want and refuse to sell.
Chickens are easy to sell off or eat, but having 5 and wanting 6 is a whole different matter entirely. They have a pecking order and do not like a newcomer on their territory.
Having 6 or 12 or 24 and wanting the perfect 5 is less of a problem when you can sell or eat them but finding the perfect 5 it is better to just start with 5 egg laying hens which are all new to your coop and arrive not knowing who is boss and are a bit more gentle about working that out, then a home team and trespassers.
Silkies are just a suggestion, get a pure breed, not ISA Browns which are a disaster for kids just looking for a place to die, in my experience and my studies of the matter.