Our furballs do that too! Noel loves to run up the screen when she see's the birds on the balcony and Noah then chases after her! It is the funniest thing to see!

About the blinds, we have verticle blinds in all the windows and on the sliding glass door....lovely apartment window coverings ...anyway, they love to weave in and out of them, hide in them, attack eachother in them and LOVE to jump at the stick thing that allows you to open and close them....so silly!