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

I teach a class (mostly online) on Friday mornings, starting Friday, August 28th. I need someone to watch my twin toddlers while I am either on my computer upstairs or (on a few Fridays) attending the class in person. The job would mostly involve playing with them and supervising them. They will have had breakfast already. They will need a mid-morning snack. One child is potty trained and only needs assistance (she just turned 2), but her twin brother is not potty trained. He will likely only require one diaper change during this time.