How can I attach a valence to the top of my virtical blinds?

https://www.michaels.com/velcro-brand-sticky-back-tape-3ft/10354421.html

Hi Carla, you can buy valance clips for vertical blinds. This great video that will show you how to install them - https://www.youtube.com/watch?v=EKgf4_Jak0Y

https://www.hometalk.com/diy/windows-doors/windows/easy-no-hardware-valance-for-blinds-23858474

Easy No-Hardware Valance for Blinds

Hi ! Years ago I saw what someone did in their home and I thought it was clever , and it might work for you . They put up a small shelf over most of the Windows in her home . She just put up 2 smaller brackets and attached a piece of wood . Then she attached a curtain of valence to it , plus it gives you storage ! In her kids room she put stuffed animals up there . In the kitchen she had baskets , in the bathroom she had some greenery ....