the foil balloons were fine, but the regular balloons were so incredibly toxic i don't know how anyone would use them for a child's party. the black ones didn't inflate at all for some reason, neither manually or with a pump. i tried to inflate the other ones and started getting physically sick and dizzy from the chemical fumes. these are totally toxic and made everyone in the house sick after only being in the room for 20 minutes. i put them outside and hours later they still smell strongly like paint thinner. no way should anyone, especially a child, be breathing near these!