• Stone specimens--can be used as parent- interactive , your relationship,gemstone digging
• Stone collection--with these stones, can share them with their playmates and play together,digging
• Mineral stone specimens--can restore the archaeological excavation process, so that learn the fun of discovery in practice, exploring
• Crystal specimens--cultivate hands-on ability and hand-eye coordination ability, exploring
• exploring --archaeological excavation can cultivate carefulness and patience,mineral stone specimens