You don’t have to be a geologist to dig these gorgeous confections. The three-tiered version is currently a favorite at weddings, but kids will appreciate something smaller, like cookies or cake. The secret to the crystallized effect? Easy-to-make rock candy. 

Have your geode cake be the star of an educational event by booking a party at the Morris Museum, home to one of best geological exhibits in New Jersey. Children hold minerals, compare different rock types and design their own bracelets using semi-precious stone beads (non-members, $10 per child,

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