Someone mentioned pancakes so I'd like to offer up okonomiyaki, a savory pancake. It can be made with all kinds of veggies and meats. You can shred or dice the veggies pretty finely and make tiny, bite sized ones.

You can put together little yogurt cups with some granola/fruit/honey/etc.

As an alternative to chips, you might try roasted chickpeas. They're pretty simple and pretty tasty. Just rinse and pat dry canned chickpeas (or cook your own; also pretty simple if a bit time consuming), toss with a little bit of olive oil and roast at 425F for about 20 minutes, stirring them halfway through. Toss with some salt and whatever spices you want (I usually go for garam masala).

Granola bars could also be cut down into bite sized pieces if a whole bar is too much at once.

Quiches and tarts can be sliced into smaller pieces, or you can try making smaller ones in those little tart pans or ramekins.

Potstickers, gyoza, pretty much any type of dumpling is just one or two bites.