Mike spent more than two months fighting for his life in hospital, three weeks of which he was in an induced coma.
Caroline Coster is determined to enjoy her "second life" despite her limbs being partially amputated.
BBC Midlands Today
A mother said she felt "absolutely helpless" when her nine-year-old son developed sepsis after his appendix burst on holiday.Copyright: Family handout
Seb Owen, from Stoke-on-Trent, was in Greece when he was rushed to hospital and had to undergo emergency surgery.
His mum, Naomi Owen, said other parents needed to be aware of the symptoms of sepsis, also known as blood poisoning.
"Hearing the words from your nine-year-old son that he wants to die, he feels like he is dying, are absolutely horrendous, and [you're] just feeling helpless as well, absolutely helpless," she said.
Symptoms in children include fast breathing, a seizure or convulsion, and a mottled, bluish or pale appearance.
Analysis earlier this year showed one in five deaths around the world was caused by sepsis, with youngsters most at risk.
By Michele Paduano
BBC Midlands health correspondent
Four-year-old William from Nottinghamshire almost died after contracting sepsis.
Four-month-old Emmanuel survived a 47-day hospital battle after contracting sepsis and coronavirus.
By Michelle Roberts
Health editor, BBC News online