Okay, so we got this geode kit for family night and OMG it was way more fun than I expected! The box says 'jumbo geodes' and they weren't kidding - these things are legit tennis ball sized!
Protip: You'll need your own hammer (they don't include one) but watching the kids' faces when we cracked open the first one? Priceless. The crystals inside were like nature's glitter bombs - so sparkly!
Fair warning though - it gets MESSY. We did it outside on the patio and still found little crystal bits everywhere. Also, not every rock is a winner - we got one dud that was just... a rock. But the other four made up for it!
The included stands and magnifying glass are nice touches. My 8-year-old is now obsessed with geology and keeps asking when we can get more. 10/10 would smash again!