Western father of three looking for helper

We are a separated family. I live alone as a father. I have my three lovely 3 children staying with me possibly 2 weeks per month (to be determined). My children are aged 5 (girl), 7 (boy) and 8 (boy) years old. My children are mostly vegetarian but also have fish occasionally. I eat all types of food including meat. You will be responsible for caring for my children first and foremost - taking them on play dates, cooking for them, cleaning, helping them get ready for the school and for their extracurricular activities, caring for them while I am at work, babysitting now and then in the evenings. Overall, you will be responsible for helping them to follow a daily routine. I need a helper who can also teach the children to be responsible for themselves (help grow their independence, tidy up after themselves, help with chores occasionally).

For cooking I need a helper who can read and try new recipes so that the children have a good variety of food. I will work on meal plans with you. 

For grocery shopping I expect careful management of budget and keeping receipts.

For housekeeping, I will provide a schedule for laundry, house cleaning, changing of bed linen etc.

First aid is an important skill to have.