Not just for little girls. Here is a simple, but highly effective drill to improve your handstand form. Just put mittens, towels or a small sponge in between your shoulders and ears. This will force you to maintain a straight body line Developing Body Alignment – Tony Gehman:
Athletes on YouTube – Mus Serir – Acrobat
Mus Serir is a capoeira trainer, Circus performer and just a super strong guy. Here he is hand balancing on parallel bars Check out his Human Flag And his 2010 hand balancing training compilation