put her on a lunge line (or long rope) and get her to move her feet.
Put some jumps/barrells out and get her to go over them, in between them, make shapes L etc and get her to go forwards and back through them.
How small a gap between 2 barrells can you get her to go through? Put a pole on ground and walk/trot over and get her to stop so only front feet are over it.
I put a tarpaulin on ground and I have to tie one horse up otherwise the other one never gets a chance to play with it.
move her forequarters over.
move her hindquarters over
can she go sideways
does she flex her neck
Walking over different things - tarpaulin etc, open and close umbrella, tie balloons to arena fencing and walk past, flap lunge line over her body and round her legs. Little and often and make it fun - always reward with a head rub. Work on getting her to lower her head from the slightest pressure, get her used to having her mouth opened etc.