Are there any types of remote pagers, tag systems, beeper systems of anykind that you can attach to any small item such as a child's gameboy, or tv remote? When they lose them constantly and instead of spending countless hours searching for them, you clap, or touch a button and they beep, such as your phone does to find it.

I am looking for a black and white war protest poster. It is of a young man placing a single flower (might be a daisy) in the barrel of a line of solders' rifles. Where can I buy this poster?