I like this build, you can use it to make custom floaties, and quick robot builds (for water).
https://www.instructables.com/id/Water-Bottle-Connector-Recycled-Building-System/
I like this build, you can use it to make custom floaties, and quick robot builds (for water).
https://www.instructables.com/id/Water-Bottle-Connector-Recycled-Building-System/