Insects in the lamp!
This one can really scare the crap out of someone! All you need is a pair of scissors and some paper. You'll need some skills as it isn't easy to cut out some insects!
All you need to do is cut out some insects and use tape to put them inside a lampshade. Watch and enjoy as your parents turn on the lamp.
Please let us know if it worked!
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.
Send An "Accidental" Text Message
Pick a 'needs to know it all' friend from your group, and send a text about a juicy secret.
Food pranks are among the best because they're easy to implement, and they generally get a big reaction, especially when someone gets something they don't expect.