Teach him how to “Mano”. Mano is when a person presses their forehead to an older person’s hand to show respect.
For merienda (usually a snack eaten in the afternoon), give your son pancit canton with slice bread (yes, we Filipinos usually put pancit canton in between the slice bread XD - I personally grew up eating those lol)
Link to a more descriptive explanation of mano (also has pictures of what mano is)
Specific brand of pancit canton Filipinos usually eat. There are other flavors too, but this spicy one is my personal favorite!
I got this for my kids and they loved it:
Learn Tagalog Phrases With Ate & Kuya: A fun and exciting book to learn https://www.amazon.com/dp/1777896509/ref=cm\_sw\_em\_r\_mt\_dp\_YGC91E9JT13P1WRG7KD3
Naiintindihan po kita, hinde po sosyal ang suliranin niyo. Pinalake ang mga bata sa kaligirang di nagpapa usbong ng tagalog, madalas mas mahalaga ang wika ng ibang mga bansa (lalo na sa ingles)
Imungkahe ko po para pabutihin ang pag intindi mo sa pagbasa ay r/tagalog at https://glosbe.com/en/tl (glosbe kapag may isa kang salita na gustong matututan o maunawaan)
I love Silent Sanctuary, even when I was a kid. Fuchsiang Pag-Ibig, released in 2007, is one of my top OPM love albums of all time. They have released a new album a few years ago and Pasensya Ka Na is my favorite track.
I can recommend more but my taste in OPM is mostly from the 2000s and early 2010s because they're the songs I grew up with. I haven't liked any recent OPM artists or bands.