During Songkran period, fairs are organized in temples. The fair can happen during the day or the night. People visit temples and make good deeds.
Traditionally Thai people visit temples, sprinkle water on the Buddha, and bless elders.
Many events (music concert, Thai boxing, movies) happen in order to get money for temples.
At the Buddhist temple, the rite of pouring water on Buddha statues, which have been previously cleaned by the monks, is performed. The ceremony is named "ROD NAM DAM HUA" or รดน้ำดำหัว. It is characterised by the pouring of water on Buddha images but also on the hands of monks and elders.
Durinf the fair, there are small stalls selling fish, birds. Freeing them is a good action.
Regarding the three incense sticks, one is for the Buddha, one for the Sangha (สังฆ - Buddhist community), one for the Dharma (ธรรม - teachings of the Buddha). The flower (ดอกไม้ - orchid or lotus) symbolizes the Buddhist teachings purity. The small candle (เทียน) symbolizes comprehension enlightenment.