Walmart offers the Fisher-Price Sit-Me-Up Floor Seat in Citrus Frog for $19. Opt for in-store pickup to dodge the $5.99 shipping charge. That's $6 under our May mention and the lowest price we could find by $10. It features a removable and machine-washable seat pad and is designed for babies who are able to support their own head and not yet able to walk or crawl.