I'm sorry for the loss of your three month old budgie. It is not necessary (and not a good idea) to show the dead budgie to the others especially if the one that passed was ill.)
To familiarize yourself with the forums, please take the time to read through all of the How To Guides, the FAQs and the stickies located at the top of each section of the forum.
You'll find most of your basic questions are answered after you've read through all of them.
I'm looking forward to hearing all about your budgies and hopefully seeing some pictures soon!!