Walmart offers LEGO McLaren Senna GTR 42123 Building Set (830 Pieces) for $39.99 (reg. $49.99) with free shipping.

Product Description:
Looking for the ultimate gift for a child or teen who loves supercar toys? This LEGO Technic McLaren Senna GTR (42123) is a great choice and adult McLaren fans will love it too! Packed with authentic features inspired by the original track-focused supercar icon; this collectible model toy is sure to set pulses racing.Realistic details and powerful functionsThe McLaren Senna GTR is a car unlike any other. And this awesome LEGO Technic toy version is equally impressive. Check out the V8 engine with moving pistons; iconic dihedral doors that open; plus authentic graphics and colors; just like on the real car.

• Steer using the wheel; then put the model on display where its sure to draw many admiring glances.
• Open up the world of engineering.
• LEGO Technic sets feature realistic movement and mechanisms that introduce LEGO builders to the universe of engineering in an approachable and realistic way.

Thanks Maggie