Ravensburger 11668 3D Puzzle Solar System
Amazon has some great deals on puzzles today, including some normally pricey 3D options that will provide the challenge you crave. This 3D solar system puzzle is actually eight puzzles in one (each planet is its own puzzle), and it's $25 off.
LIST PRICE: $69.99
Beeline - Smart Compass Navigation for Bikes - Bluetooth GPS Bicycle Computer, Waterproof and Wireless - Yellow
LIST PRICE: $139.99