According to the Travel Industry Association of America, leisure travel will increase by 3.5 percent this year, with 38 percent of summer travelers expected to bring along their children. Traveling alone can be stressful enough; add a child or two, and it can become a nightmare. But a little prevention—and the right equipment—can go a long way toward making your family vacation an experience to remember, rather than one to forget.Ride On Carry OnThis attachable folding chair transforms any regularly sized carry-on luggage (18 to 22 inches tall) into a stroller suitable for children aged eight months to five years (up to 40 lbs). Designed by a former flight attendant and mom, the Ride On Carry On easily detaches and folds flat to fit in the overhead bin, and features a headrest that swings down to serve as a tray table. $44.95 www.rideoncarryon.comAngel Alert Child Distance MonitorThis early warning system alerts parents when children stray too far in crowded areas. The child's transmitter includes a panic button in case of emergency, and the technology is designed to sound at shorter distances in a crowd and longer distances when the child and adult are within a straight sight line of each other. $34.74 www.walmart.comBaby Sherpa BackpackThe Baby Sherpa bills itself as "the first 4-in-1 diaper backpack" to hit the North American marketplace. In other words, it combines in a single hands-free bag: a cooler for snacks and beverages, a separate diaper section with a large changing pad, a protective bag for your video camera, and a personal gear bag with a secure pouch for wallets, keys, cell phones, etc. $89 www.babysherpa.com