Had a couple ideas running through my head:
-The Math World park I talked about in my project thread, a small park with stuff themed to things relating to math. Somewhat inspired by Jamp Up Land. Two of the major attractions would be Divide by 0, shown below (for right now, just imported straight from NL1):
And in the BG is a 314 ft B&M giga called Pi whose footprint would roughly resemble the letter Pi when viewed from above. Even if I don't release it all on Pi day, I might still just pretend the giga opened on Pi day.
I think there should also be a kiddie coaster called 'Cutie Pi' which is only 3.14 meters tall.
And:
A Super Mario World themed family coaster where you ride on Yoshi. Not sure when I will work more on this but I think it looks cute.