I think it’s okay if you are working with them and using it as a bonding session. I usually use makeup and nails etc as an opportunity to tell my daughters how beautiful they already are without it but we can do it for fun occasionally

I dont see an issue, my 5 year old loves when i do her nails! Mind you there is childrens nail polish which comes off just by scratching it 🙂

You dont say how old they are but I dont see that it would be an issue as long as they are supervised and taught to be very careful not to get it on clothing or furniture, etc.

It would depend on how young your kids are. I don’t have kids that are at an age to even ask about it yet, but when my sister was about 8 she had one of those kids you nail kits. It came with a little fan dryer and a bunch of nail decal. It was a really fun activity we could do together (I was about 9)