Macarons. Upside: tasty, come in pretty colors. Downside: haughty Parisians say "Macarons are not meant to be mainstream."
Macaroons. Upside: coconutty, Passover-approved. Downside: easily confused with macarons.
Rock candy in wacky flavors. Upside: lots of options. Downside: how good can rock candy really be?
Rice pudding. Upside: compatible with baby-food diet. Downside: looks like the food they eat in The Matrix.
Pot brownies. Upside: obvious. Downside: illegal.
Rugalach. Upside: convenient snack size, good with tea. Downside: would quickly be supersized and ruined by pretentious fillings.
Artisanal cotton candy. Upside: unusual. Downside: disgusting.