The kids is great for the price, kids had a fun 30 minutes digging out the gems and cleaning it afterwards. The dig also create minimal dust, which are great for parents, not alot of cleaning up after. We did it on a baking tray, I would suggest spraying little water to kill the dust also.
My only problem is the gems is on the surface of the dig (where the logo is), you quickly find all the rocks which makes the fun die out fast. Also the gems are smaller than expected. Otherwise is good introduction for the price.