Use a mannequin head and place it next to your partner while they sleep. Wake them up and as they try to look at you they freak out as they see the fake head.

This is one of the easier pranks. Exchange your victims sugar by salt and watch them suffer affer they have taken a sip of their coffee or tea.

Many people use their smartphone all the time, so one of the best ways to mess with them on April Fools' Day is to mess with their smartphone.