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Encourage imaginative play with this K'NEX 38045 building set, which enables your child to construct prop replicas of Donkey Kong and his standard kart from Mario Kart Wii. The pull-back motor propels your child's creation for high-speed fun.

Let your child explore his or her creativity while showcasing fan pride with this K'NEX 38002 set, which includes 31 parts that assemble easily, creating prop replicas of Luigi and his standard bike from Mario Kart Wii.

Let your child experience high-speed fun with this 65-piece K'NEX Mario Kart Wii 38005 set that allows easy assembly of Luigi and standard kart prop replicas. The reusable ramp package promotes imaginative play.

Help your child's creativity grow with this K'NEX 38063 set, which enables him or her to build prop replicas of Luigi and his Sprinter Kart from Mario Kart Wii. The battery-powered motor quickly propels the kart forward.

Encourage your child to explore his or her creativity with this K'NEX Mario Kart Wii 38189 set, which makes it easy to build replicas of Mario, Bowser and their battery-powered standard karts. Two obstacles provide a fun challenge.

This 246-piece K'NEX Mario Kart Wii 38352 set allows your child to craft Mario and Diddy Kong prop replicas and then race them around a closed-loop track strewn with swinging fireballs and spinning fire cog obstacles.

Let your child experience thrilling 2-wheeled fun with this 31-piece K'NEX 38001 set that allows easy assembly of a prop replica of Mario on his standard bike from Mario Kart Wii. The reusable package doubles as a ramp for enhanced play.

Let your child explore his or her creativity with this K'NEX 38003 set, which includes 66 pieces that allow your child to assemble prop replicas of Mario and his standard kart from Mario Kart Wii. The pull-back motor promotes high-speed fun.

Pique your child's creative curiosity with this K'NEX 38061 set that allows him or her to easily craft prop replicas of Mario and his Wild Wing Kart from Mario Kart Wii. The Mega Mushroom item provides imaginative play.

Let your child experience 2-wheeled excitement with this K'NEX 38147 set, which includes more than 30 parts that make it easy to assemble Toad and his standard bike from Mario Kart Wii. The reusable ramp package helps stimulate creativity.

Allow your child to show off his or her fan spirit with this K'NEX 38044 set, which includes 66 parts that make assembling replicas of Toad and his Mario Kart Wii standard kart simple. The pull-back motor offers high-speed fun.

Enhance your child's Mario Kart Wii racetrack with this K'NEX 38423 track pack that includes 24 track pieces, enabling simple expansion of an existing course. The included Mario figure and trophy item help promote imaginative play.

This 73-piece K'NEX 38351 set allows your child to explore his or her creative side by constructing Wario, his standard kart and a sliding penguin obstacle. The track provides easy connection to other Mario Kart Wii series sets (not included).

Let your child experience 2-wheeled excitement with this K'NEX 38012 set, which includes 33 parts that make it easy to construct Yoshi and his standard bike from Mario Kart Wii. The reusable package doubles as a ramp to enhance imaginative play.

Promote imaginative play with this K'NEX 38004 building set, which includes 65 pieces that enable your child to craft prop replicas of Yoshi and his standard kart from Mario Kart Wii. The pull-back motor provides high-speed fun.

Let your child show his or her fan pride while engaging creative curiosities with this K'NEX 38062 set, which allows easy assembly of Mario Kart Wii Yoshi and Wild Wing Kart prop replicas. The battery-powered motor enables high-speed fun.

Take your adventure to the Goombas circuit with this building set that features Mario and his Wild Wing Kart and a moving Goombas obstacle. Motorized Karts provide exciting entertainment.

Race Mario on the Thwomps circuit and avoid obstacles to ensure victory. Motorized Karts provide exciting entertainment.

Your little one can recreate Silver Hatch Racetrack's Italian F1 racing car from Roary the Racing Car with this K'NEX Maxi 82006 18-piece building set that features an adapter to let the car run on select train track systems.

Recreate a 1:29 scale replica of Denny Hamlin's #11 FedEx stock car with this K'NEX NASCAR 36017 building set that features more than 100 pieces for building fun. The official sponsor logos and color schemes help give the car an authentic appearance.

Send your child off on an imaginative racing experience with this K'NEX NASCAR 36049 set, which includes more than 90 pieces that allow him or her to easily construct a 1:29 scale replica of Kyle Busch's #18 M&M's car.

Move your favorite driver's car to the next race in style with this K'NEX NASCAR 36138 set that allows you and your child to assemble the transporter rig for Kyle Busch's #18 M&M's team. The K'NEXman driver, logos and colors offer a realistic look.

Vie for the checkered flag with this K'NEX NASCAR 36107 set that allows your child to assemble microscale replicas of Tony Stewart's #20 Home Depot and Kyle Busch's #18 M&M's cars. The paint schemes and sponsor logos offer a touch of realism.

Have fun building with your child as you and he or she use this K'NEX NASCAR 36055 set to assemble a 1:29 scale replica of Jeff Gordon's #24 Drive to End Hunger car. The realistic paint scheme and sponsor logos offer a true-to-life representation.

Help your child express his or her fan pride with this K'NEX NASCAR 36105 set that lets you and him or her assemble Jeff Gordon's #24 and Dale Jr.'s #88 race cars. The paint schemes and sponsor logos deliver added realism.