If you want to say something at a ceremony for construction workers you're going to have to try really hard. Construction is loud, so if you want to be heard you have to attempt to be louder than the drilling and smashing and digging and handing out of awards.
You try to get their attention the only way you know how, by lifting a sheep (し) above your head. The sheep baas and suddenly everything is silent, all eyes are on you. Well, they're on the sheep.
Currently there are no similar looking kanji which exist in the WaniKani learning system