javascript - jQuery - dynamically generated children dont trigger click

my code:

$(".test1").children().click(function(){
    $(".test2").append('something');           
});

$(".test2").children().on('click', function(){
    alert("done");      
});

the span with "something" should be the last child of test2 after clicking children of test1.
is my append done right? is the click event on test2 done correctly?

thx!

Answer

this works:

$(".test1").children().click(function(){

    $(".test2").append(' something');           
});

$(".test2").on('click', 'span', function(){
    alert("done");      
});

live demo