Maybe a nice smile and a quick conversation about something you're both interested in might break the ice and then you'll see if both of you are interested in each other. Some boys are a little shy when it comes to talking with girls, so you'll probably have to take the first step with an innocent conversation and then take things from there. Good luck.
Get giant ice clump, and some chisels and a hammers, and start hacking on it.
A smile and a hello. Ask how their day is going.