Wedding gift for Australia

cymrumam

My sister and her partner emigrated about 4 years ago and after 16 yrs of living together and two children have decided to get married. They are living in Australia and have decided to have a beach wedding a fair distance from their home (ie plane ride away) with just them and the children and both sets of parents.

I would like to send them a gift but it needs to be something my parents can take out and then my sister can transport back with her - so fairly light and not fragile.

I could really use some ideas please and am looking for something fairly inexpensive.

Thanks