ok... lilmissme all you have to do once you have a costume is go on to your items menu and select the costume.... of course your tama has to be an adult first.....only adult tamagotchis can wear costumes...
when you put the costume on you must go to the games menu and choose item and then put it on...of course it wont do it unless your tama is fully grown...
costumes and some other items only work when your tama is full grown. i cant wait till later today when CIARA becomes an adult then i can use the U.F.O !