Walmart offers the Tot Tutors Kids' Plastic Table with Four Chairs in Yellow or Blue for $33.30. Order via pickup to cut the price to $32.03. (Amazon offers it for the same.) That's the lowest price we could find by $14. The table measures 20" x 20" x 17"
Update: The blue item at Walmart is slightly lower at $31.78 when you choose in-store pickup.