The simplest hair bow clip is to glue an embellishment on a lined snap clip or alligator clip. (Click this link to view How To Make Boutique Hair Bow--4--Lining Hair Clips and click this link for hundreds of examples: Embellishment... )
When attaching the embellishments to the lined hair clips, make sure they are in right direction.
1) Most of the Hairbows & Hair Clips are for both side. Here are some examples.




2) Some are for right side of head and some are for left.
Right side=have their hair pulled across from the left side of their head to the right.
Left side =have their hair pulled across from the right side of their head to the left.

Above hair clip is for left side of head. (pinch on left and open on right).

Above is for right side (pinch on right and open on left)
For pigtails, it doesn't matter which direction. Here is an example--the 'right' clip on left side pigtail:

The simple way is to try it on your little girl (or yourself). It shouldn't be upside down.