Your kids will enjoy the talk as my 4 year old does and i am very sure he will have a special surprise for them !!
Say Hi from me, please !! It is not to be missed !
This is only my opinion/experience - but - we did not enjoy his talk the one and only time we attended one. He mainly teased or yelled at the audience. Not my idea of fun. He gave pins to the 2 kids he called up on stage and there was no other trading. Maybe it was an off day but we would not go to another one of his talks, there is too much else to do.