When the show starts, Tabatha is munching on a drumstick. After a close up on Darrin, the long-shot shows a bigger piece of meat (perhaps a larger, untouched drumstick) on her plate. But Sam was talking and did not fetch her another one. The camera cuts back to close-ups and, then the big piece of meat on her plate, in a split second, has turned to a drumstick's clean bone in Tabatha's hand. Next, the Mary Poppins sitter drops down and all the vegetables (green & orange stuff) have disappeared from the toddler's plate, only to instantly reappear along with an untouched drumstick. (But Sam had used no magic: it's a continuity problem!)