Simplify the following text for a Grade 11 native English-speaking person.
Original: These home-made instruments are ordinary objects adapted to or modified for making of sound , like the washtub bass , washboard , spoons , stovepipe and comb & tissue paper ( kazoo ) .
Simplified: These home-made instruments could be ordinary objects adapted to or created to make sound , like the washtub bass , washboard , spoons , stovepipe and comb & tissue paper ( kazoo ) .