YHMALL Rocket Balloons with A Free Air Pump. Giant Rocket Balloons to Whistle. Various Bright Color of Rocket Balloons Refill 1. Package include: 100 Rocket Balloons in a variety of bright colors plus two balloon pumps. Balloons inflate up to 40-Inch long. Let them go and they'll squeal, swirl and whistle through the sky. 2.Rocket balloons can be re-used after every flight for hours of entertainment. 3. In front of the inflatable balloon to pull a few times, can make the balloon expansion from the larger, develop the better shape and avoid the balloon explosion phenomenon. 4. Recommended for ages 5 years and up. 5. Perfect toy for kids and nice party decorations.