Walmart offers the Melissa & Doug Shape Sorting Clock for $8.98. (Amazon charges the same with free shipping for Prime members.) Opt for in-store pickup to dodge the $5.99 shipping charge. That's a buck under our mention from a week ago and the lowest price we could find now by $1. It features shaped number blocks that kids can put in order on the clock.
Exclusively for Prime members, Amazon offers the Melissa & Doug Deluxe Pound & Roll Tower Toy for $7.63 with free shipping. That's a buck under our mention from two weeks ago and the lowest price we've seen. (It's a current low by $10.) It purports to help build early shape, color, and size differentiation skills.