Hi, my son is 15 months old and he usually walks by holding on to one hand only. Around 10 days back he walked without any support ,without Falling and with good speed. But then he again stopped walking on floor. What is surprising is that he walks very comfortably on bed mattress without any support. But whenever we try to make him Walk on floor without support, he simply refuses to walk and sits on the floor. He never crawled on knees rather he bottom shuffles. I am unable to find the reason why he is not walking on floor. We have now started taking him out in park but there also he sits and enjoy and doesn't walk without support and walks with one hand support. Pls help what should I do to make him Walk without support the way he does on bed mattress.