Yes, there are more kid friendly versions, such as toned down versions such as af (lowercase) and censored versions such as a.f. or as heck. Other users also use symbols such as as f instead of the explicit word. There are also other intensifiers such as super, really, hella and mad that can be used instead of AF. An awareness of such differences can assist parents to identify the same usage pattern that kids can assume in the online environment. Know more about what does af mean (https://radarro.com/af-meaning/)