This little bug was so much fun, for both kids and adults. It provides amusement for ages, especially for kids, as it acts exactly like a bug, trying to scuttle and bury itself and run away from you.
The design is very clever and very simple. It has a small vibrator inside, and with the bendy rubber legs it looks like it is actually running. If it flips over the vibrator flips it over so it can keep on scurrying away. Doesn't work on soft surfaces like carpet obviously. Fairly sturdy and I don't think it would break easily.
To get a bit more fun from it, you can try building it an obstacle course, or a "playpen" so it won't run away from you and you can just watch it find all the little holes and weak points and push through to try to escape. If you have more than one, you can try to race them against each other.
The only downside is that if just one of your kids has one, all the other ones will beg you to get them their own bug!