Goal and options: Keep study flash cards organized.
output answer: Cut a piece of pool noodle then cut a slit to hold cards.

Goal and options: What color LED should I use for a 16v mark on a battery test gauge.
output answer: Because this is a strong charge, a green LED is best.

Goal and options: Remove crust from cooking pan.
output answer:
Make a solution of crushed egg shells and soapy water.