I was going to make that catnip "eggroll" it's called but then I figured I could just use one of those left behind single socks (coz the other one has run away), just stuff the sock and tie it up and save myself a lot of trouble. But, they are cute. !
Hey when I make catnip mice I never felt em. what i do is stop by the local SEARS shoe department and ask if I can have some of their free socks people use to try shoes on with ( you know those little hose looking things in a box near the register ). then i shove it full of catnip, tie a knot in it and sew the mousey up. I don't know how to felt so that's my way hehe.... hope your little mice turn out well !