Stretch it, bang it, roll it, bounce it - Silly Putty will keep you amused however you play with it. Make your own batch using the recipe given here.
Glacier GAK - Steve Spangler
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Big Batch of Silly Putty (or Gak)
DIY Flarp, Gak, Slime, Noise Putty
Homemade Gak
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Crystal Flower
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Would you like dimethylpolysiloxane with that?”
Gabriela Rosu Communicating Science (2019w211)
How Silly Putty Works
DIY Flarp, Gak, Slime, Noise Putty