If your kids love taco night, surprise them with a do-it-yourself taco bar that fits neatly into a lunch box.
Scoop the flesh from the shell with a spoon into a medium bowl. Squeeze the lime juice over the avocado and stir to coat evenly. Add the salt. Use a fork to stir and mash into a chunky guacamole. Stir in tomatoes or fruit, if desired.