Instructables

Make a Solar Heated Balloon

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Step 5: Inflate everything

Now, it is time to inflate everything! First, take your handy scissors and cut a small slit into one end of the trash bags. Make this hole just big enough to blow air into using your pump (like the exhaust of a vacuum). Then, fill it up! This took me about two minutes with a shop vac. When your entire balloon becomes completely tight, seal the hole with a piece of duct tape. Also, you might want to attach a string so it won't float away!
 
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