The Balinese practice spiritual traditions in their daily life. One obvious example of this is the offerings that you will see all over Bali. Made of natural materials, you will find these offerings all over the streets, on statues, in temples, and even on the hood of cars and stuck to motorbikes.
The offerings in this photo were on a busy street in Ubud. It is polite to avoid them when walking, allowing them to deteriorate naturally.
For more information on Balinese offerings, read Bali: The Daily Offering