I’ve been looking through various collector sites searching for Millennium Falcon items that i haven’t yet discovered and came across the “Wonder World” by Hasbro.
Dated 1995, it’s part of the Power of the Force range and looks pretty interesting. (I’d be interested to see how much like Micro Machines the spacecarf are.)
From what i can see, you fill the tank up with water and a special powder turns the water into a gel. You can then float various ships, laser beams and asteroids to make your own space battles. 🙂
I can’t see this having much longevity as far as play value, but it’s an interesting item. You can pick them up pretty cheaply on ebay, but shipping to the UK can be prohibitive.