Fill the large jar halfway with sand and put in a few bits of bread. You should also spray or drop in a few drops of water. Seal the lid (Figure 2). You shouldn't need air holes as long as you open up the top every few days. Keep your ant farm out of direct sunlight. The ants will soon start building a colony!
Drop in a bit of food and water every few days, being careful not to let out any of the ants. (A thin layer of petroleum jelly inside the neck of the large jar should help).
If you intend to keep the ant farm for a long time, you should try to dig out an anthill to find a queen. But remember, ants can sting or bite. (A small number of people can be allergic to ant stings, so take that into consideration.)