Nail polish decorating 'pens'?

[jennifersofia]

Doing a party for lots of girls and the request was for a nail polishing session. Anyone have any suggestions of special pens that could be used to add finer details to polish (eg little flowers or stars etc)? I don't even know what they are called. Any particular brand names?
Thanks!

Models own (boots) do one . But if there are lots of girls maybe better value to get a set

www.modelsownit.com/nails/nail-art-pens.html

Sets

www.amazon.co.uk/Nails-Supreme-Nail-Polish-Colours/dp/B00169CIG8

www.bodyjewelleryshop.com/online_store/nail_art_pen_set_9394844.cfm?sCurrencyCode=GBP

Haven't used any of these but have used the pens before and they're good if you're patient! You can get all kind of things like adhesive gems and dipping glitter for girls like me who don't have a steady hand!