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.
For a true 103 single seat ultralight, there is no age limit; for the 2-seat light sport powered parachute, 16 to solo with a student pilot certificate and be at least 17 years old to hold a sport pilot certificate.