When dealing with a headache, try boiling one cup of apple cider vinegar and one cup of water in a pot. Pour into a heat proof bowl and put on the table or other safe place that you can lean over the bowl and cover your head with a towel. Inhale the steam for a few minutes to bring some relief.
The warning on mine says not to use prior to 4 months of age. My son was in his Jolly Jumper from 3 months. The directions of use are that if they can confidently hold up their head then they are fine.
Gross motor development in the 3- to 6-year-old should include: 1  Becoming more skilled at running, jumping, early throwing, and kicking. 2  Catching a bounced ball.  Pedaling a tricycle (at 3 years); becoming able to steer well at around age 4.