Escape Sand House

In which some kids went with their parents in a summer vacation. To don't get bored, the kids decided to built their own sand house and have fun in it. They went to find the perfect place and they did. After many house of work they built the biggest sand house ever seen. It was very nice and they designed it with all kind of objects. After playing around the house, it started to get dark and they wanted to get back to their parents. But forget the way back to them. Help the kids search around the sand house and find some clues which could lead them back to the parents.