I have had fun playing recently with this fun kit geared towards school aged children,
The Arnold Grummer's Seed Paper Flowers Paper Making Activity Set, available through this link.http://arnoldgrummer.com/seed-paper-flowers-classroom-kit.html (Use coupon code Two20 and save 20%)
I made this windowsill planter tray:
In addition to the Arnold Grummer Seed Paper Making Kit you will need an empty jar, a tub or container, and some water. The kit comes with complete easy to follow instructions.
( Over on my blog I list the other materials I used to create this specific project.)
Here is a video that gives you an idea of how I made these flowers.