If you have friends you will never be short of prank ideas. There might be funny pranks as well as scary pranks but importantly they need to qualify as good pranks. This page gives you an idea of funny April fools prank.
Pretty much agree with previous pinner: "I don't care how this picture happened. I love it." Me: "Just Leonardo Dicaprio, Daniel Radcliffe and their pets." Not sure who is the cat owner; doesn't really matter.