I was just on another site..and read a purpose for old cd/dvd racks: use in bathroom to hold extra tp, hand towels etc. Or in garden to hold little bird houses, prett...
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I'm buying property that has chunks of cinder blocks laying around.. I'm gathering them into pilesand wondering how they can be used instead of adding to a landfill
How can I repurpose 12 aluminum storm windows & screens from our sunroom (39"w x 41"t)? I saw a post about making a hot house box, but I don't really have the room f...
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What do you want to do with them? Please give more information. EJL
https://livegreen.recyclebank.com/7-Ways-to-Reuse-Empty-Tissue-Boxes
https://howdoesshe.com/23-amazing-uses-for-empty-tissue-boxes/
http://www.onecrazyhouse.com/tissue-box-uses/
https://www.babble.com/crafts-activities/24-incredible-tissue-box-crafts/
Maybe some of these will help you.
Please post your use for them. 
There are a ton of ideas on Hometalk! You can check them out here: https://www.hometalk.com/search/posts?filter=tissue%20box
You can cover them with contact paper and turn them into makeup or nail polish holders.