i had to make some drums for physics
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Step 1: Starting
grab 2-3 bottle, for this i used 2 because i didn't have a 3rd
Step 2: Cutting
cut the bottles into 3 separate parts, all have to be different sizes
Step 3: Making Sound
place a piece of paper or multiple pieces on top of the cut openings.
Step 4: Holding Them in Place
to keep them in place you can either tape the sides down, put a rubber band over the sides or glue it down.
Step 5: You're Finished
grab a stick or mallet and being to play,all three will make different sounds.