We will be in Vic falls with two teens (15 &16) and we're wondering what are the not to miss activities. Also, since we are four people the cost of the activities are very high, I.e. Helicopter tour $560. Is there any way to get discounts on the activities or do the tour operators give any breaks for families/kids? Don't want to miss anything since this is a once in a lifetime trip, but do need to keep the budget in mind. Thank you.