Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: Make a yo yo
Tie a string around the center of two rubber balls that are connected together  and glue it in place. Dry and use as a yo yo
Buy a yo yo kit or follow instructions online to make one from household items.