Need to Move an Object Up and Down to Reveal Something Underneath!

Hi! Looking to build a replica of a time capsule that moves up and down to reveal something underneath. I have attached a 3D Rendering of what I hope the finished product looks like.

Everything would be made out of plywood (the base) and the cylinder would be a building from tube from Home Depot. I want to raise the cylindrical portion of the structure to reveal something in the base. Thank you in advance for anyone’s help!

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You could use something like this: