Answer:
The husband should enter into the wrestling competition whilst the wife practices her archery skills. The kids should be mounted on horseback galloping across the Mongolian steppes towards the finish line at Ulaanbaatar. That should make the whole thing pretty enjoyable.
Alternatively turn up at the National Sports Stadium in Ulaanbaatar on 13th July and spend the day eating and drinking arak, whilst enjoying the wonderful atmosphere and watching the events. The next day a good idea is to escape the crowds, head towards one of the smaller villages to see how the festival is celebrated in the countryside.