Make Dough. Mix flour, coffee grounds, salt and sand. Gradually stir in only enough water until mixture holds together.
Do not over wet! Dough that is too wet takes longer to dry!
Mold handfuls of dough around small plastic dinosaurs (or other small plastic toys).
Allow up to a week to air dry! Plan your party fun accordingly, make these well ahead of time.
Use for party favors, as kids party game (hide and seek with the eggs) then let children smash open with a hammer or rock. They’ll love them!