i personally think that there is more kavod Shabbos in polishing your shoes, than in having a different pair for Shabbos. (especially my children, where i would have to pay for the shoes.)
BTW yeruhsalymer, i take offense, i am from GG, and my boys do NOT have shabbos shoes, buckles, tommy hilfiger or anything alse. And yes, brooklyn, i think girls are different, they should be more into their looks, and they run around less, so of course it makes sense to buy them an extra pair of shoes.
BTW yerushalaymer again, if you really lived in yerushalayim you would have sent your son to “kaytana” with sandals not sneakers.