For our neighbor buddy's third birthday, I crocheted this tiny Little Mermaid (aka Ariel):
I bought the pattern from Etsy for $2.99, and it is a really nicely written set of instructions! Ariel is about 6 inches tall, and she worked up pretty quickly (maybe 3 hours or so). I absolutely love how the hair turned out. In fact, I kind of want to borrow back Sami's Strawberry Shortcake doll and re-do the hair using this methodology, but I'll probably just leave well enough alone.
Sonia thinks the Little Mermaid doll is pretty cool! She's never seen the movie, but she has danced to Under the Sea (in her dance recital), so she is vaguely aware of Ariel and her exploits.