Roadside stands also serve barbecued pork, chicken and offal, such as pig's blood (colloquially, Betamax after its rectangular shape), chicken heads (helmet), chicken feet (adidas) pig's ears and chicken intestines (isaw). Among more esoteric foods are balut and penoy (duck eggs; with fetus and without, respectively), tokneneng and quek-quek (battered, deep-fried chicken and quail eggs) and deep-fried day-old-chick.
selling balut, chicharon and boiled quail eggs (above)
balut (from youngest to eldest chick)
You can also discover Taho, a type of soft beancurd served with syrup and tapioca balls is another snack.
Palamig (literally, coolers) are sold, such as traditional offerings like halo-halo (halo means mix) and many kinds of fruit juices. Sorbetes (or, colloquially, "dirty ice cream") and locally-produced ice-cream in exotic flavors such as mango, cheese and yam.
There are a lot more street foods that i have not mention. It's up to you to discover those foods when you will visit Philippines.