Well, the OT and I only discussed this briefly because I already felt pretty clear on what (not) to do - don't work to increase the laxity and avoid sports with high speed direction changes and other activities that put joints at risk.

If they do dance, gymnastics, circus, or similar don't allow them to push their already flexible joints to new heights - because chances are when they are no longer as fit and strong they will still have the extra flexiblity/fragility in their joints that they worked to get. And perhaps avoid the sports that often lead to knee, ankle or elbow injuries - netball, soccer, tennis all come to mind. Netball is particularly harsh on knees and ankles so I am very happy that my DD does not enjoy it and I will not encourage her to persist.