Is electronic cigarettes safe to smoke around children?

Yes: No risk of second hand smoke. The downsides are possible accidental use by the child and the continuing damage to your body from the nicotine.

Secondhand aerosol: from ESDs contains nicotine, ultrafine particles & low levels of toxins that may cause cancer. (Acetaldehyde (MS), Benzene (SS), Cadmium (MS), Formaldehyde (MS,SS), Isoprene (SS), Lead (MS), Nickel (MS), Nicotine (MS, SS), N- Nitrosonornicotine (MS, SS), Toluene (MS, SS).) REF: https://no-smoke.org/electronic-smoking-devices-secondhand-aerosol/