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You have a few PHP issues preventing output-

1. it appears your foreach is commented out with //.
2. you do foreach( $our_children as $children ), but then you use $our_children instead of $children inside the foreach.
3. $children->Age is for accessing an object’s property, but what you have here is an array, so it should be $children['Age']

–

foreach ( $our_children as $children ) {
    echo '<tr><td>'. $children['Name'] .'</td><td>'. $children['Age'] .'</td></tr>';
}