Wherever possible they have also been asked to mirror the contact groups children are in at school, and to ensure there is no mixing between groups.
Lle bynnag y bo modd, gofynnwyd iddynt hefyd adlewyrchu'r grwpiau cyswllt y mae plant ynddynt yn yr ysgol, a sicrhau nad oes cymysgu rhwng grwpiau.