Olgierd Kabala
Olgierd Kabala voted up Janet Kidwell's answer
When I taught 3rd/4th grade, I would always begin with a couple simple demonstrations. Something as simple as flapping their arms back and forth or fanning one another will show that air is matter. Parachutes are a great teaching tool for air. With supervision, balloons also get the point across.
Olgierd Kabala
Olgierd Kabala voted up Charles Davis' answer

Actually humans are a weak species, did you know that an Orangutan can bend a 1" thick steel bar bare handed? A chimp is 10 times stronger then the average human? Ants can do this because they evolved to have that ability, if they didn't have that ability, they'd never be able to move a … Read more

Olgierd Kabala
Olgierd Kabala voted up Charles Davis' answer

Actually humans are a weak species, did you know that an Orangutan can bend a 1" thick steel bar bare handed? A chimp is 10 times stronger then the average human? Ants can do this because they evolved to have that ability, if they didn't have that ability, they'd never be able to move a … Read more