UPDATE:

Had Jacob seen by a highly recommended physiotherapist yesterday. He said that his limp is the result of him having "Quad Lag" and gave us some exercises to do. I can remember most of them, but could really benefit some input on form. I want to add a variety of exercises to try to keep in interesting for him and need to know that we are doing them correctly. Can anyone suggest exercises for quad lag and if possible, provide a link to video or a good description of how they are to be performed?

I know the good people here and hammered with questions all the time, but I could really use some help....please?

Thanks in advance for your time and effort.

Jacobs Dad Jim