For the decorations we hung lots of crepe paper, alternating light blue and dark blue, across the room to form a sort of V pointing at the "Happy Birthday Owen" that I printed out on the computer & cut out. The super heroes are a larger version of the ones on the cake.
Above the cake and presents I hung a garland of circles (about 3 inches and about 4 1/2 inches) cut out of paper that said super hero "noises" like "crunch" "ka-pow" "zonk" & some others. I alternated 1 big circle then 2 little, strung on white curling ribbon.
The decorations were simple, but had big impact. It was a fun party...watch for the next posts...they will be the tutorials I promised :)