I really like where you're going with this, but the wheelchair reference is too strong as the majority of our clients are not in wheelchairs - they might have downs syndrome, partial paralysis, mental retardation, or other health issues that affect mobility and coordination, but are not wheelchair bound. Also like the star, but this one looks a little too much like the star over Bethlehem that you commonly see at Christmas.
WOW, these are great!! I really like both 19 and 21 - the only thing on #19 is the horse silhouette - his neck looks a little fat - kind of like the neck of a cow. maybe make the neck a bit thinner and add a little bit of a mane to make sure everyone knows it's a horse - the "reaching for the stars" idea is perfect. This is going to be a really tough decision