Puja:

Puja: which can be very elaborate like we often see in temples or very simple by just burning incense and offering a fruit or flower. As Krishna says in Bhagavad Gita 9:26
“patram pushpam phalam toyam/ yo me bhaktya prayacchati
tad aham bhakty-upahritam/ ashnami prayatatmanah”
If one offers me with devotion a leaf a flower or some water, I will accept it.