I thought this might be a bit of fun:

The only rules are that there is a very limited to to solve the wall (two and a half minutes on TV, but three on the site I use to make them) and that once two groups have been found, you get three lives to find the remaining two groups. The game ends early if all three lives are lost. On the show contestants can still get points for the groups they missed if they can find the connection at that point, but we don't need to worry about that here. 

The subjects on Connecting Walls vary widely. The show specialises in some very obscure stuff sometimes. The ones I post here will no doubt be much easier.

Apologies for the very long winded URLs, that's just how they generate. 

This first game is entirely metal themed (real walls don't stick to one theme).

http://connecting-wall.netlify.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" rel="nofollow - https://connecting-wall.netlify.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

Another one with a more mixed theme.

http://connecting-wall.netlify.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" rel="nofollow - https://connecting-wall.netlify.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

Please do not post the answers to the puzzles in the thread to avoid spoiling them for others. 

If you fancy a go at making one and posting it here the editor is found at:

http://connecting-wall.netlify.app/editor" rel="nofollow - https://connecting-wall.netlify.app/editor