On a recent summer walk with my children I was reminded of a rhyme from my own childhood. It centred around a feathery grass stem and I proceeded to demonstrate it to my sons...
Here's a tree in summer (taking a feathery grass stem in one hand),
Here's a tree in winter (pull your finger and thumb up the stem gathering up the seeds and striping the stem),
Here's a bunch of flowers (show the bunch of seeds),