Southfield (WWJ)  -- A popular baby seat is also potentially dangerous and being recalled.

CBS The Early Show consumer correspondent Susan Koeppen reports the Consumer Product Safety Commission has announced the voluntary recall of about a million Bumbo "Baby Sitter" Seats, made by Bumbo International of South Africa.

The CPSC says, "If the seat is placed on a table, countertop, chair, or other elevated surface, young children can arch their backs, flip out of the Bumbo seat, and fall onto the floor, posing a risk of serious head injuries."

The agency says it's had 28 reports of young children falling out of the seats, and sustaining injuries that included three skull fractures suffered when kids fell out of Bumbo seats that had been placed on tables.

The seats were sold by Target, Wal-Mart, Sears, Kmart, Toys R Us, Babies R Us, USA Babies, and various other toy and children's stores nationwide, as well as numerous online vendors, from August 2003 through October 2007, the CPSC says. They cost $40.

Consumers should never use the infant seat on a table, countertop, chair, or other elevated surface, the agency warns.

It adds that consumers can contact Bumbo to obtain warning label stickers and instructions, free of charge. The new warning label will state: "WARNING -- Prevent Falls; Never use on any elevated surface."

Consumers should use the Bumbo seat at ground level, but should never leave a child unattended when the youngster is in the seat, the CPSC points out.

Consumers can contact Bumbo International at (877) 932-8626 between 8 a.m. and 5 p.m. eastern time, Monday through Friday, or visit the firm's Web site at www.bumbosafety.com.