Home » Mr. McGroovy's How To
Build Magical Memories
They grow up so fast! Do all the creative things you imagined doing as a parent. With Mr. McGroovy's Box Rivets™ and project plans it's easy to build magical childhood memories.
Project Ideas
How to Build a Cardboard Castle
With Mr. McGroovy's Cardboard Castle Kit (cardboard boxes not included) and these plans, it's easy for anyone to build a cardboard castle. You need 8 big boxes to build this design.
How to Build a Cardboard Spaceship
"Flight COM, I can't hold it, she's breaking up, she's breaking up!" If you only knew how many times I screamed that phrase in 1976. I would've traded my brother's bike to have a spaceship like this to play in just for one day.
