Amazon offers the Alex Brands Zoob 125-Piece Building Set, model no. 0Z11125, for $16.99 with free shipping. That's tied with our expired mention from four days ago and the lowest total price we could find now by $7. It includes instructions to make a variety of creations, including a DNA spiral, royal crown, and dinosaurs.
Amazon offers Prime members the Alex Toys Active Play Super Parachute, model no. 777X for $27.13 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $6.53.) That's the lowest total price we could find by $5. It includes a 10-foot diameter parachute with 12 handles and 16 plastic balls.