stirling engine recommendation or other cool techie gift?

We're looking to get a gift for a graduate.  we think he'd like a stirling engine.  Don't want one that needs a flame  but rather the ones that run when put on top of a cup of coffee.

But there's wild price differences.  Any knowledge of how good the cheaper ones are?  Do you need to spend almost $100 for reliability?

$40: https://www.amazon.com/Sunnytech-Temperature-Stirling-Engine-Education/dp/B008JOKO1O

$90: https://www.amazon.com/Temperature-Stainless-Steel-Stirling-Engine/dp/B006GT9JMO
BeGentleWithMe-INeedHelpAsked:
Who is Participating?
 
Dr. KlahnConnect With a Mentor Principal Software EngineerCommented:
Some alternate possibilities that can be enjoyed all the time, not just when fired up ...

A Galileo thermometer, with or without the bogus Fitzroy storm glass.  The larger ones are particularly impressive.

A radiometer, either stand or hanging.  The hanging ones come in sizes up to 4" in diameter.
0
 
BeGentleWithMe-INeedHelpAuthor Commented:
thanks!
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.