Being a convert, this is something I missed out on as a child. I've heard some of my Cradle Catholic friends talk about playing "Mass and Priest" with the help of NECCO.
My Aunt was mean. My bro was great. I wanted to be an altar boy.
I was about 8 when I made a big decision. I went to church...about noon. No one was there. I did the holy water and genuflecting stuff and walked down the aisle to the front rail. I climbed over the rail...and knelt by the bells...Then with the spirit of God in my heart I rang the bells three times...along with the Mea Culpa chant.
Climbed back over the railing and bee lined for the door...of course, stopping to do the Holy Water and genuflecting.
Hit the fresh air...Swear I could hear God laughing!!!
Kentucky mints worked, too, but NECCO wafers are flat, round and just about the right size. Good times.