Move Someone's Car
For this April Fools' Day prank you need to get up early or stay up late. While everyone's asleep move the car around the block. It appears stolen!
When your family members get up and notice the car is gone, they will surely freak out. Maybe they will try to call the cops. Pick a nice moment to announce they've been pranked! April Fool!!!
More April Fool Pranks
Fake head in bed
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.
Plants in your coworker's keyboard
This prank needs some preperation but is really worth it. Your coworker will show up and his keyboard will be full of little grasplants!
This one is great to fool your kids. When your kids are asleep the night before April Fools day you use food coloring to turn the milk in the carton blue!