WalMart has Rubik's Cube 3 x 3 Puzzle Game for Kids on sale.
Price is $4.49 with Free Store Pickup otherwise free shipping on orders over $35.
Also Amazon has Hasbro Gaming Rubik's 3X3 Cube, Puzzle Game, Classic Colors for $4.49 + Free Shipping for Prime Members otherwise on orders over $25.
Smart Note: This offer is valid until Saturday, Sep 14, 2019 or anytime before that. Check the price before you make a purchase.