As kids get older, they are exposed to more brands and hobbies, so arguably organizing a girl birthday party is easier, if they are into Barbie or Princesses etc. However for those a little younger, say 3 to 4 years old it can be difficult settling on a theme. One great idea is to have a “Bring Your Baby” theme, where all the guests get to bring their favourite doll or stuffed animal.

There is a great description here at:

I think this is a great idea for younger kids, as often their favourite little dolls or stuffed animals can act as a comfort for them, so it makes going to a someone’s house to a party a lot easier.  I’ll certainly be birthday party planning along these lines.