gzumwalt

My basement in Oklahoma, US Joined February 1st, 2017
216 Instructables 1,642,383 Views 1,214 Comments 1,597 Followers

Our grandkids keep me busy!

gzumwalt's Instructables

Self Reversing Screw Mechanism, Walking!

Self Reversing Screw Mechanism, Slinky!

Marblevator, Self Reversing Screw Lift.

Piranha Plant

Geneva Clock

Penguin on Ice

Marblevator, Loop 2.

Marblevator, Marble Launch Mechanism.

Christmas Tree, 2023.

Marblevator, Simple, Halloween