I like to use the ones that don't break the hair when you take them out Scunci brand. The seems to stay just as well at the rubber band type but don't break the hair when you take them out. I can slip them out without cutting but the still stay very well in her hair. The only problem would be that only the very smallest ones work the best so I always end up with a lot of the larger ones in the package. To me at least when I put them in Pebbles hair they don't cause the hair to to twist about and knot like the rubberband type.
Then I put a little barrette inside the topknot only through the front and it all stays really well. This is how I use to do my daughters hair went she was a baby too.
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