For jist under $3 US, I found an old shop hammer made differently than the typical rubber hammer.
Although this one seems to be made of rawhide – and is therefore very lightweight – it hits as hard as any hammer; a fact I discovered when I tested it on my own thigh.
I carry this around for personal protection. While someone might be watching my bat, this is actually what I might use on an attacker.
Then again it might just make a wonderful gift.