Collect & Build Ace, #4 of 4 in the Robo Battlers Series - motorized for exciting mechanical movement! This set comes with 122 K'NEX parts, primarily micro rods & connectors to build a motorized robot. And just as his name suggests, Ace moves by creeping along on four legs! And that's not all - Ace combines with Flash to build an even bigger motorized robot! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included.

Collect & Build the rides in the new Amusement Park Series! Motorized for exciting performance that sends the car up the chain lift and speeding down the track! This set comes with over 300 parts, primarily rods & connectors, to build a K'NEX thrill ride that stands over 1.5 feet tall! And if you collect Corkscrew Coaster and the Ferris Wheel (sold separately), you can have a working amusement park right in your home! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included.

Collect & Build Slasher, #1 of 4 in the Robo Battlers Series - motorized for exciting mechanical movement! This set comes with 123 K'NEX parts, primarily micro rods & connectors to build a motorized robot. And just as his name suggests, Slasher moves by scooting along! And that's not all - Slasher combines with Stomper to build an even bigger motorized robot! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included.

Collect & Build Stomper, #2 of 4 in the Robo Battlers Series - motorized for exciting mechanical movement! This set comes with 118 K'NEX parts, primarily micro rods & connectors to build a motorized robot. And just as his name suggests, Stomper moves by jumping! And that's not all - Stomper combines with Slasher to build an even bigger motorized robot! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included.

Collect & Build the rides in the new Amusement Park Series! Motorized for exciting performance that sends the car up the chain lift and spiraling through track! This set comes with over 300 parts, primarily rods & connectors, to build a K'NEX thrill ride that stands over 1.5 feet tall! And if you collect Vertical Viper and the Ferris Wheel (sold separately), you can have a working amusement park right in your home! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included.

Collect & Build all four vehicles in the Construction Crew Series - Excavator, Front Loader, Steam Roller and Backhoe! Each set comes with approximately 120 K'NEX parts, including bricks, rods and connectors to build a working construction vehicle.

Collect & Build the rides in the new Amusement Park Series! Motorized for realistic performance that takes the seats around the wheel! This set comes with over 400 parts, primarily rods & connectors, to build a K'NEX thrill ride that stands over 1.5 feet tall! And if you collect Corkscrew Coaster and Vertical Viper (sold separately), you can have a working amusement park right in your home! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included.

Collect & Build Flash, #3 of 4 in the Robo Battlers Series - motorized for exciting mechanical movement! This set comes with 120 K'NEX parts, primarily micro rods & connectors to build a motorized robot. And just as his name suggests, Flash moves with lightning quickness on wheels! And that's not all - Flash combines with Ace to build an even bigger motorized robot! Recommended for builders ages 7+. Requires 2 "AA" batteries, not included.

Collect & Build all four vehicles in the Construction Crew Series - Excavator, Front Loader, Steam Roller and Backhoe! Each set comes with approximately 120 K'NEX parts, including bricks, rods and connectors to build a working construction vehicle.

Collect & Build all four vehicles in the Construction Crew Series - Excavator, Front Loader, Steam Roller and Backhoe! Each set comes with approximately 120 K'NEX parts, including bricks, rods and connectors to build a working construction vehicle.

Collect & Build all four vehicles in the Construction Crew Series - Excavator, Front Loader, Steam Roller and Backhoe! Each set comes with approximately 120 K'NEX parts, including bricks, rods and connectors to build a working construction vehicle.