I feel silly asking this but I am just too curious to know...
You know how sitting up, standing up, walking, etc. were massive development phases and causes sleep regression? Just wondering if somersaulting is one to? DS (29 month old now) has been non stop somersaulting in his crib before sleeping and on wake up. His sleep is not the best but not the worst either so I am not too concerned... just the constant somersaulting!!