Quick, summer is over and fall is threatening with freezing temperatures. Take the last few days of nice weather and collect some seeds to use in winter projects.
Fall is the time when many plants are losing their seeds and beginning to die off for winter. Round up some of these dried up flowers so your students can examine the seeds left behind, then plant some in soil so they can see them sprout. With luck they may grow through the winter, not only adding a little green life to your room, but also illustrating the plant cycle.
Gently place a small bag over the dead flower head. Using a pair of scissors, snip the entire head off into the bag. Repeat to collect several heads. When you’re ready to use the seeds, close the bag and shake to loosen the seeds from the flower heads. Some seeds will release easier than others.