Haha, sweet question! Height tu just measure berapa tinggi kita dari kepala sampai kaki lah, my kids always want to know why they're getting taller every year I'm around 160cm, nothing fancy, but enough to reach the top shelves (most of the time!). Anyway, the growing apple tree thing sounds fun for the kids' learning, remind them that people and plants both grow at different speeds, and that's totally normal!