Elephant Toothpaste
https://sciencebob.com/fantastic-foamy-fountain/
Static Electricity Balloon
https://www.sciencekids.co.nz/experiments/staticelectricity.html
Balloon Fire
https://www.stevespanglerscience.com/lab/experiments/fire-water-balloon/
Bouncy Ball
https://thestemlaboratory.com/how-to-make-bouncy-balls/