Nye, offer part-time childcare in Marble hill

I have two boys aged 4 and 12. I need someone to look after them from 4pm until 7pm Monday - Thursday.

The 4 year old attends nursery school which finishes at 5pm. He will need collecting from school, bringing home, feeding and looking after until I return home. I will usually return by 7pm but may be later if there are train problems.
The 12 year will arrive home at 4pm unless he visits his friends. When he comes home, he will need feeding. He won't need much looking after apart from that as he is quite independent.