Scratch

Just use lists, when they put in their names use this

when gf clicked
delete [all v] of [names v]
repeat <how many names you want inputed>
ask [what's your name?] and wait
add <answer> to item (last v) of [names v]
end

Now you have all the names stored in the list, to make the sprite say the name there are 2 ways to do it.

One way to do it:

when gf clicked
wait until <you're ready for it to say the names>
say <join<join<join <item (1 v) of [names v]> <item (2 v) of [names v]>><item (3 v) of [names v]>><item (4 v) of [names v]>> // That is to say that you only have 4 names, if there's more, add in more joins and put in item 5 of names and so on and so forth

Another way to do it is (this one you don't need all those joins)

when gf clicked
wait until <you're ready for it to say the names>
set [name counter v] to [0]
repeat <length of [names v]>
change [name counter v] by [1]
say <item <name counter> of [names]> for (3) secs //the 3 can be changed to however long you want
end

Hope this helps!

Thank you!