30-30 should be good, I had one when I was 9yrs old and it sort of kicked. But after I grew into it more did not do it much. If you guys are taking childern hunting I suggest that you match the size of the child to the gun, so that they would have better control, stock length and arm reach. Also be sure to use a smaller caliber bullet. Some people will say that a few grains of powder will not make a difference in a bullet, but I think it does. Just my two cents !