@Eiro that's what I did!

Build a really tall car and see the peformance

make an electric generator :v or a mechanic bike

from my experience, if you don't know what to build, take a break or you'll burn yourself out, however if you must build, i'd go with BuiltBionixInd10's idea of building mechs, they can really fun to build but also technically challenging

I built a windmill. Try doing things you haven't done before.

You haven’t build up Park Place yet
@BuiltBionixInd10

In a time like this, I would usually step outside my comfort zone and do something interesting

@Awsomur I don't own any taxes from your apartments

I’m afraid you’ve got the monopoly on that my friend.
@BuiltBionixInd10

build a controlled cruise missile

Maybe build food

Same

Maybe build a gunship that is covered with guns that can one shot everything so that you will cause destruction on land, sea, air and your device.......
Jk

go build some mechs