Have a great time at the Mermaid Birthday Party because Ariel is celebrating her sixteenth birthday with her best friends! Elsa and Rapunzel have both taken their mermaid forms in order to join their friend underwater. They have to choose the right place to party and decorate it with banners, lights or colorful balloons. Then dress up all of them in new fun mermaid outfits and style their hair. There is no real birthday without a cake and Ariel's looks delicious, so let them dive in. Then they can all show off their musical talent by playing on different instruments. The princesses have also brought presents and Ariel is ready to open them up.