Christmas Gag Gifts
Place candy in a pretty jar and put a label on it describing the type of "poop" it is, and give it to someone as a gag gift at Christmas. Reindeer poop might be chocolate-covered apricots, Elf poop is candy-coated chocolates, snowman poop is marshmallows. Use green jellybeans for Grinch poop.
Big Box Gag
When you're giving someone a small gift, place it in a small box and wrap it. Place that box into a slightly larger box and wrap it. Place that box into a larger box and wrap it. Continue to do this several times. If the final box is very large, the person thinks they are getting a large gift. This works best with a child because each time they see a wrapped gift, they think that's the present, then laugh when all they have is another box.
Short Sheet
Short sheeting a bed is a classic prank. Take the blankets off a person's bed. Take the top sheet up from under the mattress where it's tucked in. Pull it up over the top of the bed, where the pillow goes, and tuck it under the mattress. Take the bottom part, at the foot of the bed, and fold it over, bringing it up to where the sheet normally would rest. Now, when the person tries to get into bed, there's only a short pocket for them to try to fit into, and it may take them a few minutes to figure out what's wrong with their bed.
Food Prank
A fun prank for the family on April Fool's Day, or any day, is to serve the family a "dinner" that isn't what it looks like. Making food look like something it's not is fun when you see the puzzled expression on the family's faces. Serve your family a "chicken pot pie." Purchase frozen chicken pot pies and cook them. Carefully remove the top crust, and pour out the insides. Place vanilla pudding in the pan, along with cut-up dried apples for fake chicken. Roll out yellow Starbursts and cut them into corn-sized pieces, then shape them into corn shapes. Roll out green Starbursts and cut them into pea-sized pieces, then roll them into pea shapes. Cut orange Starbursts into four squares for the carrots. Place all the ingredients into the pudding and place the crust on top. It will look just like chicken pot pie and the family will be surprised when they take a bite.