Breeding crickets is easy. Take a 55 gallon aquarium, there cheap, place about 6-12'' of top soil in the aquarium, make sure it is an all natural brand with no pesticides. You need to keep the soild moist, I did so by misting ever so often. Then I placed about 500 crickets in the aquarium and BAM! I had babies. I couldn't use all the crickets, lol. I fed them Gut load, apples, oranges, potatoes etc. I had plenty of places for them to hide as well. It helped when I placed the aquarium in a dark closet. Closet temp was around 85 all the time, I never increased or decreased temp, I kept it natural. I ended up using them for fishing to keep the numbers down. I did move the pin heads to a seperate 10 gallon basically set up the same. I am sure there is a more "professional" way of breeding them, but this worked for me. They would tunnel down into the soil, so they could hide, lay eggs, basically a natural setting for them.