Osten is starting to assert himself by throwing miniature temper tantrums. Back arching in his high chair, throwing himself down when you set him down. Pushing himself around on the floor after throwing himself down. He's a strong little person and he's just building those muscles even stronger every time he throws a tantrum.
He is such a delightful child though. His caregivers always comment "were all your children this easy?". I think and remember the answer is YES...everyone has their moments, but our kids have been a delight to live with.