Here's why:

* Hydrogen peroxide is a strong oxidizer. It can cause reactions with other substances, some of which can be dangerous.

* Tang drink powder contains citric acid. Mixing citric acid with hydrogen peroxide can create a reaction that releases heat and potentially flammable gases.

This combination is not safe and could lead to serious injuries or even an explosion.

It's important to remember:

* Always follow the instructions on product labels.

* Never mix chemicals unless you are a trained professional in a safe environment.

If you're looking for a safe and fun science experiment, there are many other options available.