Discovery™ 3-in-1 Balloon Pumper lets you fill up balloons with air or water and even features a mister function to cool you down between splashes. With 400 balloons included, you’ll be ready to le ... t the splashes rip with an epic water balloon fight! The pump is completely portable and does not require a hose. Just fill the tank with water from any source – kitchen sink, bucket, pool – and get the fun in the sun started! PORTABLE WATER FILLER: Use the pump to fill balloons with water using any available water source. You can even use a bucket. Just fill the tank and slip balloons onto the easy-fill nozzle. AIR PUMP: You can leave the water out of the tank and pump up balloons with air: great for decorating. MISTER: Perfect on hot summer days, the Balloon Pumper can also be used as a mister for a refreshing cool down. REUSABLE: Works with most latex balloons. Just dry between uses and reuse it again and again. EDUCATIONAL FUN AT HOME: Makes a great toy or gift for children to learn at home. Keep developing their minds and creativity while home on school breaks.