All you need to enjoy a short ride with children is a helmet and bicycle. But if you plan to ride for a full day or embark on a multi-day journey, you will need to give thought to your equipment. Child bike seats, ideal for half-day rides, offer tykes little freedom. Bike trailers, carts pulled by an adult biker, allow the under 5 crowd to play, sleep and squirm. Trailer bikes or tag-a-longs make it possible for kids aged 5-9 to peddle longer. What's more, they're safer. Single bikes give children a greater sense of accomplishment; tandems give parents more control. Bike bags, saddlebags and panniers, overkill on a day trip, are a must on unassisted cycling holidays. Padded bike shorts are fundamental for avoiding a sore bum. Fingerless bike gloves are fundamental for avoiding sore hands. Shatterproof sunglasses protect eyes from more than wind and glare; they shield them from bugs and stones.