As you can see Ben fully engages his cheeks and expels every drop of oxygen from his lungs in one big gust.
Alex hasn't quite figured out the concept of how to blow straight out. He pokes his bottom lip out and ends up blowing straight up into his hair leaving the dandelion fully intact.
He will also attempt to blow through his nose. When all else fails he just flails his arms around until eventually all the seeds have been released from the stem.
I love Springtime!