Build beyond and create WOW with the K'NEX Imagine 25th Anniversary Ultimate Builder's Case. Celebrate 25 years of K'NEX with this classic building set that includes 750 classic scale K'NEX rods and connectors to build anything you can imagine. The enclosed step-by-step color-coded instructions showcases 50 unique models of varying size and difficulty. Builders can chose to create a sailing ship, fire truck, light house, or design whatever they can imagine! Done building? Use the re-usable plastic storage case, a flashback to the original case design from the early 1900s, to store your K'NEX rods and connectors. Most models can be built one at a time. Recommended for builders ages 7 and older.