Can I use photographs I took of children (with verbal parental conset), from a public event and put them on my website?

I own a small business where I dress up in charector for Children's events. I want to use the pictures I took from public events (not birthday parties) on my website. This pictures will not be able to be purchased in anyway- I simply want to show photos from the event on my Facebook website. Am I allowed to do this (I asked parental consent of the parents all of the children are under 18). These public events take place in "ticketed events" where parents need to purchase a ticket to come in. An example of a past event would be breakfast with Santa. I am not Santa, but another charector that is hired for entertainment.