Welcome to the LARGEST STEM EXPO in Texas!

We hope you had a great time today at Dallas ISD STEM Expo 2020!

We value your participation and continued passion for all things STEM! If you haven't already, please explore and enjoy all the educational booths the Expo has to offer.

On behalf of DISD's STEM department and Mad Science of DFW, thank you for coming. Have a STEMtastic day!

Kids at a table making slime in a cup

Slime Time!

Slime is a polymer- mixing a polymer and a cross-linker forms what we call slime

Slime is moist, soft, sticky and found in nature. The two ingredients to make slime are polymers and cross-linkers. Polymers look like chains of repeating links. Cross-linkers help clump the polymer chains together. The more cross-linker added to the polymer, the clumpier the slime will get. Polyvinyl alcohol is a type of polymer, and sodium borate is a type of cross-linker.