[blParent] Attaching a bell to a crawling baby

[Tony Malykh]

Hello all,
Our baby has started to crawl around the house, and in order not to trip 
over him, we'd like to attach a bell to him.
Where is the best place to attach the bell, and how can we attach it? 
Safety pins come to mind, but I wanted to check if there are any better 
suggestions.
And also, are there any other solutions to this problem? Like maybe 
there is a smart electronic device that only beeps when blind parents 
are approaching...

Thanks!
Tony