K'Nex 74-piece Rocket Car Building Set for $5.49 on Amazon (limit 3 per account)

Amazon has got this K'Nex Rocket Car Building Set (74 pieces) for $5.49 with free Prime shipping.  It got 4.7 out of 5 stars over 24 customer reviews.  Limit 3 per account.

• ENDLESS BUILDING POSSIBILITIES – Let your children experience endless building possibilities with this unique building system from K’NEX! This introductory building set comes with 74 different pieces — rods and connectors alike — that can be clicked together into a rocket car! Then they can use the parts to dream up their own creations.
• REAL MOVING PARTS – Unlike other building toys, K’NEX allows your kids to create big models that actually move! Kids can build interactive toys using the different classic pieces of this set.
• COMBINATION BUILD - The parts and pieces from the Rocket Car building set can be combined with two other K'NEX sets - the Stealth Plane and the Motorcycle - to create an awesome helicopter.
• EASY TO USE – Easy-to-follow building instructions come with the K’NEX Rocket Car Building Set. Unleash your kids’ creativity! This building set is recommended for kids ages 5 and above.
• STEAMagination: It’s the connection of STEAM (science, technology, engineering, arts & math) with a child’s natural curiosity and creativity and it powers the fun of each and every K’NEX® building set. Building with K’NEX puts children on a path towards a fundamental understanding of STEAM/STEM subjects.