Babysitter Needed for my Children - Full-time / Part-time

I have two children, a boy who is 4. 5 years old and a girl who is 3. They are used to a stay at home mom life and do well with flexible schedules. They love to be outside, art projects, books, and music. My boy loves dinosaurs and building legos and blocks. My girl loves art, music, and dress up. I am a stay at home mom and I have a health condition leading to multiple appointments and treatments a week. Things have become overwhelming around the house due to this so Im looking for some part-time help so my kids can have fun and my house is easier to maintain. We have one cat and live on a military base.