Kids tend to do a lot of not-so-smart things. A lot of times, the damage they cause, whether intentionally or accidentally, leaves you having to repair or replace something. When it comes to appliances, the damages caused by kids are not covered under any homeowner's insurance, nor is the damage covered under the appliance's warranty. Such is the case with microwaves. The following examples are some of the less-than-smart things kids have tried to do to microwaves which resulted in necessary repair bills.