How do i make a Developer Product that gives a random "tool" when bought?

So to expand my question i wanted to know if, i was able to make it that..

1. You buy a Developer Product.
2. Then it will give you an random tool from lighting/serverstorage.

--> Prompt user to buy the developer product. --> Confirm user bought the developer product. --> Give them a random tool.

Try scripting it for yourself if you want us to give you code.