56 of 62 people found the following review helpful
Not a bad purchase,
= Durability: = Fun: = Educational:
This review is from: 4M Crystal Mining Kit (Toy)
My 10 year old really liked "mining" for these crystals. She did not attempt to get all the crystals out of the block in one setting. She did a little bit of chipping away of the block, whenever she felt like it. I actually found myself chipping away at it a time or two, it was thrapeutic for me:>. Once you see a piece of a crystal it's exciting. I'm going to look for a more challenging one for her this year. I recommend this, but you must have patience.