mild spastic diplegia at 3yrs & cant stand or walk independa

hi my daughter was diagnosed with mild spastic diplegia when she was almost a year.in july last year she had her tendons and hamstring release surgery.although this was done she cannot stand or walk without support.she is turning four this year. can anyone please tell me of exercises or anything i can do to help her get to that level.i am so desperate for a solution for her problem.thanks in advance