<https://educationforum.ipbhost.com/topic/19-aviation/page/2/#comment-1591>
<http://schema.org/text>
"I am now starting to look at practical activities that will combine some science with simple design elements. \nPower flight using non hazardous chemicals \nBest design (highest) for a hot air balloon. Students design and make, the teacher supplies the hot air.  \n  "
<https://educationforum.ipbhost.com/topic/19-aviation/page/2/?tab=comments#comment-695>