Never leaves a gap unfilled

Never leaves a gap unfilled 
Always pays on time 
Always fits the bill 
He comes well prepared
Cube top, squared-off 
Eight corners, 90 degree angles 
Flat top, stares straight ahead 
Stock parts, blockhead

Never tips over 
Stands up on his own 
He is a blockhead 
Thinking man full grown 
He comes well prepared
Cube top, squared-off 
Eight corners, 90 degree angles 
Flat top, stares straight ahead 
Snake eyes, blockhead

Flat top, stares straight ahead 
Stock parts, blockhead

Never tips over 
Stands up on his own 
He is a blockhead 
Thinking man full grown 
He comes well prepared

Cube top (Blockhead) 
Squared-off (Blockhead) 
Eight comers (Blockhead) 
90 degree angles 
Flat top (Blockhead) 
Stares straight ahead (Blockhead) 
Snake eyes (Blockhead)
Blockhead (Blockhead) 
Cube top (Blockhead) 
Squared-off (Blockhead) 
Eight corners (Blockhead) 
90 degree angles 
Flat top (Blockhead) 
Stares straight ahead (Blockhead) 
Stock parts (Blockhead) 
Blockhead (Blockhead)