Counting

Glue 2 of the boys together. There are ${4 \choose 2} = 6$ ways to do this. There are also 2 ways to order the 2 boys. 

Now, there are $8!$ ways to order everyone (the 2 boys count as 1 person). 

This makes for $8! \times 6 \times 2= \color{brown}\boxed{483840 }$ ways.