I think it depends on where the party takes place & how well I know these people and the other kids’ families. There are so many potential hazards. Crazy story - 6th bday party. Dad drops off his 4-5 yr old uninvited & leaves her for like 4+ Hours. Everyone looks out for her till finally we realize no one knows who she is. Turns out it was the neighbor. I took her home. All I could do not to cuss him. He didn’t check on her at all. This is what NOT to do.