from my experience, no. it helped ease my breathing. just make sure the kids got his/her inhaler and dont do anything that can cause heavy breathing if he/she really wants to smoke
yeah, smoking very little bit of weed actually helps, i read it somewhere in a magazine that it actually helps smokeing marijuana. But smoking too much can be a big problem and yeah deffinately have your inhaler on ya, its a lifsaver =P
Invest in a good vaporizer. They are far better then smoking. Cannabis is a binocular dilator and does actually help with asthma but smoking it isn't always the best way to take it.