Childcare Needed - Full-time / Part-time

My 22-year-old grandson's girlfriend just had a baby yesterday. They have a 1 1/2-year-old boy. She is unable to come home for 2 weeks and my grandson has physical issues (back, etc.) where he needs help with the newborn and 1 1/2-year-old. They live in an apartment so the extra bedroom could be made available for someone to stay for 2 to 3 weeks.