Ahhh what a great moment caught! Your photo also makes the viewer smile.

Good shutter speed to catch these two running and giggling, there is a bit of a blur which is nice because we get caught in the action. The composition is centered but consider an off centered composition to give them more room to run into, it may give you a stronger impact. I especially like the purse that little girl has it says "DREAM" and that is so true to youth filled with happiness and dreams. Remember, that part of the creative process is the title. In gallery showings oftentimes it is the title that can help in the sale of an image. I love the happiness here in this photograph.

Good facial expressions in this,slight blurness in those legs but as they were running,thats okay,would crop behind a little,only because they are a bit central,but minor point because I like it overall.