A nonsense poem for the letter D. D is less complicated than C as it has only one 'hard sound' associated with it.
Some parents may find that their child uses the letter 'd' in place of 'g'. My own son, Reuben, did this and it was one of the things that made me realise he needed to see a speech therapist - this was a very positive experience for my son and gave him huge amounts of confidence as he learnt to pronounce letters properly.