| There's an entire section intended for older kids/young teens - Explore Zone, with Lego-inspired video games, science/technology-related activities, relatively "extreme" rides, etc. I'd start there - you may just be able to leave the older one there. Depending on the kid, the Lego models in Miniland USA may also be totally fascinating - it brings out the geeky kid in everyone.
The park has a circular layout, not hub-and-spoke. While there are opportunities to take shortcuts, they're relatively few. Most folks start going clockwise around the park, but with older kids I suggest you go counter-clockwise, as you'll get to Imagination Zone in short order.
Have fun - of all the non-Disney theme park operators, I feel Legoland "gets" the Disney experience better than all the rest.
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Co-Author, PassPorter Walt Disney World, PassPorter's Field Guide to the Disney Cruise Line, and PassPorter Disneyland and Southern California Attractions
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