Scootaloo's Party

Scootaloo's Party is a Newborn Cuties set released during G3.5. It comes with Scootaloo wearing a hot pink diaper, a purple openable present, a pink birthday cake with a blue number 1 on top, a pink party hat, and yellow and pink balloons.

Official description
It’s SCOOTALOO pony’s first birthday and she needs you to help celebrate! Put on her adorable party hat so she’s dressed just right and then surprise her with her special balloons and birthday cake accessories. But wait, the party’s not over yet—treat your precious little pony to a special “birthday present” just for her!