I think something more like this:

http://www.amazon.com/Thudguard-Baby-Safety-Helmet-Color/dp/B001OWCOTS/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1368805651&sr=1-1-catcorr&keywords=baby+walking+helmet

I will confess to buying one of those for our first kid. I cut the ears off. In addition, it made him fall more becasue he woudl let go of his support to remove the helmet, and then promptly fall on his face. That episode was my first, and hopefully last, bout with over-protection hysteria.