One idea could be to organize a birthday party in the style of Shrek at an interesting location, such as a hotel or club. For decoration, elements from the movie can be used, such as boxes of donations, green lawns, and other elements. As music, the Shrek soundtrack can be used and guests can be given the opportunity to take a selfie with Shrek. For entertainment, competitions and games related to the film can be held, such as a costume contest or a contest for the best imitation of Shrek's voice.