My favourite colour is yellow! I had some yellow hair clips, and found some yellow buttons and yellow bows.
I sewed the buttons on to the bows, then sewed the bows on to the hairclips. If you can't sew, glue them on instead :)
Wear your hair clips :)
Why stop there?! You could add Trolls...
Or how about HELLO KITTY?! >^_^<