Hello Zahra
I am happy to know that little S is growing and starting his first steps. I don't think that there is any prroblem at all falling while he is trying to walk. Make sure that he is taking a good supplement of calcium, magnesium, zinc and vitamin D ( By the way, the first time i saw Osteocare was in Dubai, so i thinki t will be easy to find there), generally all children need this at the toddler age whether thal or non thal
As long as you are keeping his HB in a good level, giving supplements and monitering growth and chelating when needed, everything will be just fine his bones and allhsi body functions.
As for keeping him still during transfusions, i think getting a portable DVD with his favorite cartoons will do. Also try to get the series of Baby Mozart, Baby Einstein, baby Bach... they are so interesting for babies and toddlers. I remember when i wanted to leave my children quiet for an hour to do anything i used to play one of these CDs they work like magic. My children were like frozen statues when they see them as they get so absoarbed. They are also very educational.
manal