This set is the Black Friday special set that will be $20, but if you don't want to be watching at midnight online or brave the Walmart store on thanksgiving, $36.97 is the price right now. These larger sets usually aren't available until after black friday. To put into perspective, the other large creative box that has 790 pieces is currently $48 which is on sale down from $59.99. So this is a great deal assuming you'd like to avoid the Black Friday gamble. This item will ship free alone.
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Duplo set also available at same link if you click the duplo option but it's $39.99