what are those little baby chairs called that help babies sit up?

Question by kay l: what are those little baby chairs called that help babies sit up?
they are made of plastic and there is a divider that goes betweem their legs. do they work?
Best answer:
Answer by MeganThey’re called Bumbo seats. We never had one but a friend did and liked it. I heard they’ve been recalled [...] http://bit.ly/e9z7Sd