The CM on the phone actually stated that we would be offered a child swap. It was another DISer that said that they thought the tour guide would watch the 2 year old. I have now been told a few times (by phone and email) that this tour is for all ages and that she is welcome to join us. I'm sure that they have a plan in place for such cases. At the very least I'm certain that we will be offered a child swap pass which I will have to use on another day due to the timing of the tour (it ends at park close). These are available for anybody traveling with a child who doesn't meet a height restriction and are always usable on a different day......how I enter the line (standby, Fastpass, tour) shouldn't be relevant. The older kids I'm taking are actually my nephews (we share a love of Disney that their parents don't!) and the 2 year is my daughter so I definitely don't want to leave her out of the fun. It seems that not everybody agrees that young kids should be on this tour but this is how Disney has marketed this tour. I'm definitely not expecting a refund if things don't work out. I'm happy to take this risk as Disney has the child swap program in place for these exact circumstances.