This is a speaker made out of cups and a cardboard tube.
The supplies you need are:
A cardboard tube
A Styrofoam cup
A tape measure or ruler
A fine point marker or pen
A box cutter or x-acto knife
A bottle of Elmer’s glue(Optional)
and A pair of scissors(Optional).
Step 1: Step 1

Step 2: Step 2

Step 3: Step 3

Step 4: Step 4
