schoolboy needs a special coffin after his sudden and unexplained death.Tributes are pouring in for 'pure soul' Aiden Cross after he died at his home in Cumbernauld on February 18th.His distraught parents tried to carry out CPR on the 13-year-old, who suffered from spina bifida and hydrocephalus, in a desperate bid to save him before he passed away.Coroners have so far been unable establish the cause of death leaving his family devastated.Now friends are raising funds for the 'happy, bubbly and