three-wheel cart

When I was a young, the happiest and most important memory is that my grandfather use three-wheel cart to pick my brother and I up to school that is far away about 2kilometers, because we lived at countryside and school was in the city, there was less buses passing countryside, when the scientific machine was not popular. Whether it was rain or hot or not, my grandfather all picks up us to school, so when I was in the street, I saw children was picked up by old people on cart, and I always remind of my grandfather.