Dolls and playsets inspired by Barbie and Chelsea The Lost Birthday take young imaginations on travel adventures packed with exploration and animal friends! These sisters are celebrating Chelsea doll's birthday, and young imaginations are invited to join the fun. Three animal friends are invited, too -- this playset inspires sweet friendship stories with a baby giraffe, elephant and monkey! Barbie doll and Chelsea doll are party-ready in island-inspired fashions and accessories, and themed pieces like a cake and present set the scene for a wild celebration. Dolls cannot stand alone. Colors and decorations may vary. Barbie and Chelsea The Lost Birthday Dolls, Pets & Accessories For 3 To 7 Year Olds: Age Range: 3 Years and Up.