Will build themselves a hot air balloon, using the most basic of materials.
{Excepting Dad's air bubble}
They were deflated, but not discouraged, to find out that this contraption wouldn't really take to the air. I admire so much their creativity and determination! Just one more plug for the freedom of home educating.
{And yes, sometimes these children left to themselves really do complete the well-known Proverb. I just don't happen to have my camera in hand as often when that happens!}