Most Dads are fans of accessories, and if he already is up to speed with utilitarian sports clothing, electronic gizmo's, or tools, the time is ripe for gifting him with gadgets for Fathers Day. No matter his interests or hobbies, there's bound to be something on the lists below that will delight him.
Even if he doesn't morph into a big-time photographer on family outings, he will appreciate the convenience of this easy-to-carry-along Joby Gorillapod Camera Holder ($13) for his point-and-shoot digital camera. This versatile, lightweight (less than two ounces) tripod is adjustable to about any uneven surface -- rocks, a car hood, wrapped around a telephone pole -- and will support any digital camera weighing in at 12 ounces or less.
Suitable for either right or left-handed users, this birch veneer Overlap Tray ($179) allows a Dad to bring his work to the back porch or den (or if he's as affectionate as you think he is, deliver breakfast in bed to you). Lightweight and spill-proof, the tray has a cork-lined depression for drinks and miscellaneous writing instruments, and will easily support a full-sized laptop, legal-sized office documents, or school papers for grading, for example.
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If you need a gift for a Dad who likes the out of doors, consider a GPS; many are small and lightweight, and inexpensive. As is this Garmin eTrex Venture GPS (was $170, now on sale for $125); this highly sensitive GPS receiver will help your Dad locate himself in deep woods or a canyon, or on a street lined with skyscrapers. Built-in base map, one-handed operation, waterproof housing, and runs on a pair of (your) AA batteries. Nice.