Crickets can be a real pain. They may not seem like it at first but they can damage your plants, upholstery, drapes, or anything cotton or silk. On top of that they will chirp to rub it in and just anger you at that point. That is why they must go, as well as setup preventive measures to keep them from ever coming back!
I highly suggest Diatomaceous Earth, they make safe and non toxic pellets which kill the insects who eat it within 48 hours. It not only takes care of crickets but also cockroaches, ants, earwigs, silverfish, millipedes, and centipedes. Since it is non toxic it is quite safe to use around pets and children, though I would still be careful of course, as I am still sure it isn't good for you to inhale or ingest in any manner.
To apply it though you simply sprinkle it around the yard, or in the cracks and crevices in which the crickets are congregating. If you have no idea where the crickets are coming from there is a way to find out. Simply get some sticky traps, they are pretty generically for all insects. All you gotta do is lay them in some different areas such as in closets and under the refrigerator and so on. Then after a few days you will notice one of them will probably catch a bunch while the others catch little to none. Now you know where they travel in your house, or at least a better idea. Put the poison around those areas, especially where you caught the most. You might want to try and search for the crack in which they are getting in and out of the walls too. If you can find this crack and fill it with poison you are pretty much guaranteed to kill off all of the crickets.
Did you know, you can actually influence crickets with some bright lawn lights. Keep these lights away from your house of course and let the crickets be attracted to it. They will get swooped off by predators for the most part and you won't have to deal with them.
Also you can place the Diatomaceous Earth out and around the yard so that the first thing the crickets do upon entering you yard is die. There are other poisons better suited for this preventive measure and if you want a sure thing then a professional would probably come up with the best strategy for your yard.