Good quality marble. Not sure what can be called bad marble but they are transparent and seem to hold my 4 kids. The only complaint I can have is that the packaging was damaged upon delivery. I don't think Amazon put it in an envelope instead of a box. If it was wrapped in bubble wrap would it still break? I don't know because the marble container is pretty weak for the weight of the marbles so I don't think it would have lasted anyway. All in all a decent price for a decent amount of balls!
Dynamic Movement Sensory Sox For Kids 6-9 Years - Updated Version, Medium, 47''LX27''W Green By Sanho
22 Review
Zippered FoxPlay Basketball Ball Pit: Unleash Fun and Excitement!
9 Review
GOGOSO Pink Balls For Ball Pit - Pack Of 100 Ball Pits Ball Pink, BPA Free Plastic Ball Toys Crush Proof Ocean Balls Phthalate Free For Girls Toddlers Indoor Outdoor - Pearl Pink Colors
10 Review
Fun And Safe Playtime With PlayMaty 100 Colorful Pit Balls For Kids
30 Review