Yes, it is completely safe for a child to use/have the Aires Defender Infinity on them. However, one must keep in mind that if you have a string around a baby’s neck it might not be the best option for a little child as there is a risk of suffocation. Parents must use their discretion as to where they feel the safest fit for the Aires Defender Infinity is on their child (e.g. a pocket), and take into account the child’s age, and maturity. If we are speaking about a new born in a crib, most parents have the Infinity hanging or under the mattress also somewhere on the crib and an Aires Shield Extreme on the baby monitor.