Ankle eversion with resistance band (Ankle eversion strengthening, with band, sitting leg straight)

Sit with your legs straight out in front of you.
Bend the leg you won't be exercising and place your foot on the floor
Place the band around the outside of your affected foot.
You can either securely tie the band to a stable object or a grown up could hold band out to your side.
Keeping your leg still and your knee facing up to the ceiling turn your foot out against the band.
Slowly let your foot back in and return to the starting position.