I don't go outside so it's rare for me to do acts of kindness
We may have that as an overlap. Yet, for clients, chores, and much needed hikes, I do go outside.
Something that I love to do and which may bring a moment of joy to neighbours and passers-by, I love when they stop and we have short to long conversations about anything. I try to make them laugh for a few moments before they go. Mind you,it's hard to hold back my very odd sense of humour as I do not want to spook people.

Simple humour and light convo are what we share on a sidewalk or grassy meadow.