This glowing decorative balloons are ideal for Weddings, Birthday, Christmas,Valentine's Day Partys etc. You can first appropriate inflatable, and then you can put the balloon put feathers, small balloons, color paper and other fillers. And then continue to inflate to the best degree 20 cm.These balloons should be inflated by Inflatable equipment, electric air balloons pump would be a better choice, please do not blow balloons with your mouth. no helium required.