The prizes that your pets leave in the yard when they drop a deuce. Often you may not see them right away if you are not watching your pet do their duty. If you find the land mines, your shoes are likely destroyed.
Person: I need to take the dog outside for a walk in the yard.
Spouse: ok be careful, he planted several land mines in the yard earlier.
When small children drop cheerios all over the floor and an adult later steps on one. Instead of exploding like a landmind, you hear a crunch and the cheerio turns to a fine powder that is almost impossible to clean up without a vacuum.
Heather: "Anna please eat your cheerios in the chair!!!"
Anna: "OK Mommy!" (Running off with cheerios in hand to see what is outside leaving a trail of cheerios.)
Tom: (Wakes from sleep, another long night of taking care of the screaming kids) "Oh I am so tired.." CRUNCH "Oh damn it, I just stepped on a cheerio landmine. Get the vacuum!!! ANNNNAAAAA!!!!!!"