Ds(4) loves a marble run and got the extreme set for his birthday and used some of his money to buy the rocket and basic set as that's what we thought we needed for the massive set up on the box (seeing as that's what it says). However, looking on the website it seems you actually need 2 of the extreme sets and I dont really want to spend another 50.... so, any fantastical ideas or examples anyone could share please?
I am fully aware that if you don't know what marble rush is then this will make no sense!