Movie about a group of kids on a treasure hunt to Australia?

[calenture]

I think it came out in the early 90s or late 80s. There's a group of kids, they find a letter that talks about a treasure on the "other side of the world", and they set off to find it. One of them initially thinks the treasure is in China but then they realize it's actually somewhere in Australia. All I remember is that when they get there, the "

Comments

[meangel]

"Tommy Tricker and the Stamp Traveler" (1988), one of my favorite movies.