Triceratops has 3 horns

During whole class time, O. said that Triceratops has 3 horns. He said it in relation to the 3 circles we had been counting and talking about over the past few days.

The picture led to more discussion. 

That there are 2 big horns and 1 small horn. 
That the Triceratops in the picture is bigger than the Triceratops we have in the classroom. 
That all of the Triceratops have 3 horns.
Some are bigger so they are not exactly the same.

Number talks based on children's interest in dinosaurs.