Nice perspective from the past! The seams on those things would cut, but damn you could land some good blows, without working too many baby teeth loose... maybe that's why parents buy them! Not really blunt force, but concussive blows, spinal disc problems as well.
It was really fun to blow up a slightly split one (mostly patched), then pop it against someones head. As the split widened, the game got dicier. Anyway, nice piece man!