Helping collect grafting material

Today I have been helping Dad to collect cuttings from the trees. Apparently if you cut a twig of the current year's growth, you can bind it to a living stem of a young plant and it will join and a new tree will grow.
Dad climbs the trees to get the material...sometimes it is difficult and there a few cross words!
I hang around at the base and generally look cute while trying to avoid falling branches. Here I am below a Betula utilis from Bhutan.