Looking for a certain toy line. They were a lot like Mighty Max, but they were all vehicle based. The playsets themselves were vehicles that opened into little playsets for micro machine-esque miniature cars.
I distinctly remember one that looked like a futuristic gray truck thing with a dome-shaped cab.
I know exactly the line you're talking about but can't find them online.
The toy you're thinking about had something to do with the moon, and when you opened it up had a worm or something in a crater on one side. I think it had six wheels.
There was also a Jungle jeep, a red horror train, and an orange drill tank.