Aikido's perfect, don't worry, it will take him years before becoming a danger to his sourroundings, giving him the time to mature mentally, for your daughter too ;) ideally letting her stay in front on the learning curve!

My family all train aikido ;)

You mean what? Mother tongues are italian, german and french and foreign are english and japanese

Don't know how to raise my hand :) 3 mother tongues for me + 2 learned ones !