This is probably too late for the season but I'll share it anyway. You might still want to use it regardless what season it is.
So the whole summer, we filled our window display with flowers and this is what it looked like. It's feels like our window had a little garden of its own.
Of course, these summer flowers are free printables for your own use. You can stick them in the wall of your room or glass windows as well. You can download them here: Flower 1; Flower 2, Flower 3.
If you have more ideas on how to use these lovely flowers, feel free to leave a comment or link, I would love to know what creative ideas you have. However, as courtesy, please do not use these for resell. It is meant for all the crafters to enjoy them for free.