What is the chemical reaction in a home-made high-bouncer ball?
I have google it and got the link which explains the process but don't show the organic reactions(might be because they are complex)


  This activity demonstrates an interesting chemical reaction, primarily between the borax and the glue. The borax acts as a “cross-linker” to the polymer molecules in the glue – basically it creates chains of molecules that stay together when you pick them up. The cornstarch helps to bind the molecules together so that they hold their shape better. - See more at: Sciencebob