Looking for DIY Uses for overhead transperencies

I have several boxes of leftover (new) overhead projector transparencies. Would love to see some clever and fun uses for them.

5,100+ Overhead Transparencies Stock Photos, Pictures & Royalty-Free Images - iStock

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30 Sheets Transparency Film For Inkjet/Laser Jet Printers - 8.5 X 11 Inch 4.5 Mil Printable Transparency Paper For OHP Film Overhead Projector Film Or

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DIY Video Projector from an old Overhead Projector

This multi-functional Koala transparency film is compatible with Inkjet Printer and Copier. You could perfectly use it for printing charts or graphics

Koala Transparency Film for Inkjet Printer 50 Sheets Crystal Clear Film Paper for Crafting, Overhead Projector, Screen Printing - 8.5x11 Inches

3 Ways to Print Transparencies - wikiHow

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DIY overhead projector (how to paint an image on the wall)

7 Innovative Ways to Use Up Old Transparencies - The Art of Education University

5 Projects for Inkjet Transparency Film - Octago Products

5,100+ Overhead Transparencies Stock Photos, Pictures & Royalty-Free Images - iStock

DIY overhead projector (how to paint an image on the wall)

Transparency Film Photo Ornaments

High precision printing, can clearly show fine text dot. Wide Applications: Our transparency-sheets for overhead projector applicable to aerospace

60 Sheets Transparency-Film Paper Clear for Overhead Projector, Transparencies P