The second picture in the set has your license plate man, edit that one out!
For kids, as long as what they are doing has rest time and understands that their muscles and tendons are more elastic and easier to damage than ours, I think it's alright to add in some light resistance training. They sort of do that type of stuff on their own when they are playing so teaching them how to do it in a controlled fashion is a decent idea, I think.
!ENGAGE 20
ENGAGEtokens.