<input name="myModels[children[0]]" type="text" />

print_r($_FILES);

<form action="/Test/uploadTest.php" method="post" enctype="multipart/form-data" >
    File1 <input name="myModels[postedFiles[0]]" type="file" /></br>
    File2 <input name="myModels[postedFiles[1]]" type="file" /></br>
    <input type="submit" value="post" />
</form>

print_r($_FILES);