I agree with laurence.But maybe,you need to get a certain level in tech,like in VV1 you need level 3 in fertility to get twins and trips,and in VV2 you need level two in Exploration to get the cauldron,maybe you'll need level two in one thing,and level 3 in another to make some kind of pot to cook in or something like that.

I AM NOT A BETA TESTER LEAKING SECRETS!
I AM ONLY ELEVEN YEARS OLD AND DO NOT
EVEN KNOW HOW TO SEND A VIRUS SO THERE!