The glue is a polymer, which is a long chain of molecules all hooked together like tangled noodles. When you mix the two solutions together, the water molecules start linking up the noodles together all along the length of each noodle to get more like a fishnet. Scientists call this a polymetric compound of sodium tetraborate and lactated glue. We call it bouncy putty.


Here’s what you do:


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25 Responses to “Bouncy Putty Slime”

  1. Aurora Lipper says:

    A tablespoon is too much. Don’t put more than a teaspoon of water into the back. If you put in too much water, the slime will break apart.

  2. lisrivera7 says:

    is it ok if I added 1 tablespoon of water to the bag with the slime

  3. Brook Batzel says:

    i made this with my mom once! and my brothers. and_#supecharged sience is cool!

  4. Brook Batzel says:

    im going to watch this vidio then make a bouncy putty slime!

  5. Brook Batzel says:

    PUB PUB PUB PUB!

  6. You can – it will keep the slime hydrated, but too much water will cause it to break apart.

  7. Michelle Stevens says:

    Should I put all of the slime I make in a bag with a teaspoon of water, or is it just for this experiment?

  8. Irenio and Deena Mateo says:

    thanks for the info!

  9. No, it’s much more gradual, like your skin.

  10. Heather May says:

    does the putty soak up water like a sponge?

  11. It may look like it’s not absorbing the water, but keeping it in a bath does help. If you put too much water, it will eventually break apart and dissolve, so you can just put it in a plastic bag with a teaspoon of water and it should be fine.

  12. Irenio and Deena Mateo says:

    How do i keep my slime moist? it doesn’t absorb water. I tried filling a container with water and putting the slime in but the water just settled on the top and took the borax with it when i poured the water out.

  13. Sharon McKinnis says:

    My 10-yr-old daughter just said that this was her FAVORITE science project of the whole summer! We repeated the project, only changing the amounts of the glue mixture to 1/2 cup each of glue & water. (And, of course, a different color! 😉 It made QUITE a handful! It’s amazing, too, how cool (temperature) it remains.

  14. Barbara Beaumont says:

    Hi Aurora, well finally after days of trying to get our account to let us watch the videos, we made the polymer putty and it was amazing and fun. thank you. We can’t wait to have more fun like this.

  15. Anna Mauch says:

    Love it!

  16. Borax is a laundry whitener (you add it to your laundry soap to get the laundry to look brighter). Technically, it dyes your fabrics bluer which actually make them look whiter (no kidding). Chemical name is sodium tetraborate.

  17. Danielle Elizalde says:

    BORAX is dry laundry detergent aka 20 mule team borax

  18. Kirsten Lara says:

    what is borsaks

  19. Danielle Elizalde says:

    but he hardly ate half a teaspoon and he eats glass!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

  20. Danielle Elizalde says:

    what can i do to help him

  21. No. You need to do ALL chemistry experiments away from small children and pets. This slime has laundry soap and glue in it – both of which are not to eat! Read up on our chemistry safe practices here.

  22. Danielle Elizalde says:

    i mean ATE

  23. Danielle Elizalde says:

    my dog at a little of this will he be ok?

  24. Rachel Moser says:

    In the written instructions, it would be nice if it said “1 T glue and 1T of water” in step 2 like it does on the video. My kids didn’t watch the video first, but instead just tried to follow the written directions. They randomly chose much larger measurements of glue and water to do as their “equal parts” and wasted a lot of glue.

  25. Kristin Cardwell says:

    My kids just put each of their bouncy putty into small containers to keep until morning, and they realized that it is also “noisy” putty. They are hooked on science. Thanks, Aurora!