Kids going on a treasure hunt with a riddle

Movies
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1

Looking for a movie back in the 90’s I believe, It’s definitely not The Goonies.
It’s about kids going on a treasure hunt and they have a riddle to follow and somewhere like the dessert. Very vaguely remember. Brings back my childhood. Please find this !! :frowning:

2

Not a perfect match, but maybe
“Midnight Madness” (1980)?

3

How old are the kids, how many they are? What kind of desert, like the Sahara or Arizona?

4

The Treasure of the White Falcons (2005)?

5

“The Famous five 4”?

6

Could it be “The Treasure” 1990?