i agree if you are worried write up a waiver
also i do shows for kids, get them to sit and be calm, explain to them that they dont like to be startled and lay a few ground rules down before you bring out the snake and get them to repeat it if necessary so that they understand, if they dont follow the rules the animal goes away, simple as that. its also best done before eating as well, i find...the kids that is. i find handicapped kids are very eager to please, and it would be a good experience for them. chances are tho being handicapped and only 5 and 7 i wouldn't let them hold the snake unless you felt absolutely confident about it as severity in handicapped children differs from one individual to the next. i also control the head at all times, so that the only part the child gets to pet is the rear end.