I very much enjoy making my own tricks. I enjoy the process and I find that it makes the effect more incredible. A red tube with the face of a Chinese Conjurer on it announces "Magic Trick". However, an oatmeal tube at breakfast is quite unexpected.
I have not had much luck at my local Shop finding good books on the construction of modest gafs and gimmicks. There seems to be several books on building stage illusions (and some of these concepts are adaptable), but I can not find any books on constructing smaller parlor and close-up tricks. Any suggestions?