Teaching kids

I'm in the process of trying to fund a martial arts gym in my area but in the meantime, what drills and things do you do to help teach a 6 and 8 year old? Both girls, both excited to learn but both are impatient with techniques.

I'll slow them down, they'll do it right, then as I speed them up, it's like my 6 year old isn't even trying the same martial art anymore.