scream and whine a lot, then throw a fit which includes throwing their heads backwards onto the ground?
I'm wondering if I should buy my son a helmet. He spends about 50% of the day crying, whining and writhing on the ground. I do stuff with him, his 4-year old sister and 8 month old brother all day long. I am always there to play and love him ... not sure what he's complaining about ...
Other than that, he spends the other 50% of the day happy and playful.