Don't you ever wish you could get your annoying siblings out of your world, Or get free porkchops? Maybe kill those annoying creepers without using your sword? Well, with my trap, you can! By the way, this is one I made, I didn't steal it, it's my own design.
Step 1: Step 1: Create a Box
First, you will need a diamond block, signs, wood and torches. I recommend doing this in creative, then switch to Survival once you have finished. Make a box with your wood. It can be a big or as small as you like. Don't forget to make holes for doors!
Step 2: Step 2: Put in the Diamond Block
Put the Diamond Block in the Back of the box. Don't put the sign over the diamond. I accidentally did that and it didn't work.
Step 3: Step Three: Adding in the Other Signs
Create a small box, two blocks high, around the diamond block. Next, place a sign above the diamond block saying destroy me. After that, put a sign outside the small box saying stand here.
Step 4: Step 4: Adding in the Sand
Break the top of the small box, and replace it with sand. The sign will hold the sand up. Then, pile up the sand. Make the pile of sand as high as you want, but make sure it is very high, so people will have a hard time digging out.
Step 5: Step 5: Finishing Touches!
Light up the trap and make the roof. You can cover the sand up, but I didn't.
Step 6: Step 6: Testing It
Finally, switch the game to survival. Go to your trap, and break the sign saying destroy me. The sand should come down. Now, go and switch it back to creative, reset it, and turn it back to survival. Time to trick people!