Dear All, Please kindly help with some ideas /advises .My son is almost 12 , and he is getting weaker and weaker every day. For now we use a scooter to go back and forth ...soon we will need to give up the scooter and change to a power chair.I have looked at the power chairs available and they all are very , very heavy and big.My problem is that we live at the 4 th floor in a block of flats , and…