Simplify the following text for a Grade 5 native English-speaking person.
Original: It was a creature standing 3 ' 6 '' ( 105 cm ) at approximately 20-24 pounds .
Simplified: It was a creature standing 3 ' 6 '' ( 105 cm ) and weighing about 20 â `` 24 pounds ( 9 â `` 11 kg ) .