What crafts I wish I was doing

On Easter Sunday I was dragged around all day to Pretty Boy's family gatherings.  At the first, I happened upon a box of K'NEXs, and Pretty Boy and I proceeded to build most of a egg beater ride.  At the next, we found two boxes of LEGOs.  I built a bridge over a stream for the horses to use to cross.  Pretty Boy built a snowmobile with a working suspension.  It was fun to see all the younger kids put down their cell phone and start picking through the LEGO box and building whatever they wanted to. 

It also made me want to build all the things.  Including these things:

Its a cat condo made out of cardboard and felt.  I would thoroughly enjoy making it, and my cats would love it for a week and then refuse to ever look at it again, and we would be happy. 

These are technically pieces of children's furniture.  Wonderfully detailed instructions on how to make the furniture are available for free from foldschool.  I don't know what exactly I would do with them, but I would love crafting them.  There is always an abundance of cardboard waiting to be recycled at my house.  I wish I had the time to put it to good use.