Yellow socks for Cucu

I bought another pair of socks for Cucu/Sūnzi/孙子. These ones have little airoplanes on - just to remind him/her that nenek/Nǎinai/奶奶 will visit him/her in an aeroplane! Now I have another pair of moulds which I can give to a friend. I am also thinking of looking for plaster of paris to make better lasting moulds. These plastic ones crack too easily.