Children will fall in love with these wonderful characters as the Meet the Digraphs. Two letters that come together to form a single sound are taught in primary school as "letter digraphs." Children will fall in love with these wonderful characters as the Meet the Digraphs. Two letters that come together to form a single sound are taught in primary school as "letter digraphs." Children will fall in love with these wonderful characters as the Meet the Digraphs. Two letters that come together to form a single sound are taught in primary school as "letter digraphs." Children will fall in love with these wonderful characters as the Meet the Digraphs. Two letters that come together to form a single sound are taught in primary school as "letter digraphs."