There are some really great bicycling themed gifts for kids. Here are a few of my favorites:
I first discovered Nutcase helmets last year at Interbike and immediately loved them. Nutcase helmets are designed with tons of colorful graphics and they make wearing a helmet fun. They fit really well, thanks to the adjustable spin dial, and they don't fall backwards like so many children's helmets do. The magnetic closure is great too for preventing pinches when bucking your child's helmet. They come in both adult and kid sizes. I have purchased four in the past year, one for each family member. My middle school aged son loves the "glowing brain, for biking, skateboarding and scootering. My first grade daughter feels like a super hero in her "stars and stripes" helmet. Nutcase helmets are available locally at Green Guru's Cruiser Boutique in Boulder, REI, and Performance. They can also be found online at Amazon.
Nite Ize, based out of Boulder, makes some really fun bike lights for kids. Both of my children have Night Ize "spoke lights" on their bikes, which look pretty spectacular as they rotate around on their wheels. These make excellent stocking stuffers, which is great because finding small gifts to fit in stockings can be a challenge. Night Ize are available locally at REI, Sports Authority, and Eddie Bauer. I've also seen them at several toy stores in the Front Range area. They can also be purchased on Amazon.
Lastly, what's not to love about jeans with protective built-in pads for bmx and skateboarding. Here is my review of this great product. Grindz can be found online at Target and Amazon.