Make sure you are playing on at least "Easy" difficulty, as achievements are disabled in Peaceful mode.
And somewhere in the code, the game itself wrote a new achievement, just for her: "Make the world softer than you found it." lovely craft piston trap all achievements free
The "Lovely Craft" method suggests using a Villager (safely walled off) or a Turtle Egg as bait to lure Zombies and Skeletons into the center of the trap. Once they step on the pressure plate, the pistons retract, dropping them into a chamber where they are stuck. Unlocking "All Achievements" with One Build Make sure you are playing on at least