The Hifiman RE2 might be a good choice: http://www.head-direct.com/product_detail.php?p=23. They cost $29. I can't think of better iems in this price range. You might want to go for the combo with the FIIO E5 for 10 bucks more. In case you decide to buy better phones later the FIIO will be nice...

What you can do (if you are in the US and have the default US settings) is change the Clip's region settings to Europe. Because of European Law the European settings have the max volume limited. The  US settings will be way to loud for your 7-year old.   See also...

I was looking for a cheap and portble headset to use together with skype and bought this 20$ in-ear headset.   As they sounded quite good with Skype I was wondering how they would sound with music, so I decided to give it a try and plugged them into my D2 (and also in my Rockboxed Clip+). No...

You could check out the Beyerdynamic DT770 PRO/80. They cost about $200 and have a LOT of bass and good islolation. Mids and highs are also there. You can turn up the volume quite a bit without disturbing your surroundings. I use them a lot on the train where the bass doesn't get lost (!). On...