Smoking and Pregnancy: The Risks of Vaping Children are curious. Don't let vapes fall into little hands. Vapes can be poisonous and extremely dangerous to young children. Even a small amount can cause severe health issues. Protect your kids A mom letting her kid play with her vape on the subway. When the kid tried to put it in his mouth, she said, 'Nooo, don't do that !'" : r mildlyinfuriating Secondhand smoke and vape can trigger your child's asthma attacks. Smoking and vaping are unhealthy for everyone but especially harmful for people with asthma. Whether at home, in the car, or If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs.