Just as your child may have outgrown some of his or her warm-weather clothes, he or she may have gotten too big for his or her bike helmet.
A properly fitting helmet is key to keeping your child safe, according to Safe Kids USA, a network of organizations dedicated to helping kids avoid injuries.
The network suggests using the Eyes, Ears and Mouth Test to see if a child's helmet is the appropriate size.
Eyes check: Position the helmet on your head. Look up and you should see the bottom rim of the helmet. The rim should be one to two finger-widths above the eyebrows.
Ears check: Make sure the straps of the helmet form a "V" under your ears when buckled. The strap should be snug but comfortable.
Mouth check: Open your mouth as wide as you can. Do you feel the helmet hug your head? If not, tighten those straps and make sure the buckle is flat against your skin.
To ensure the best fit, Safe Kids USA suggests taking your child with you when shopping for a helmet.
-Melissa Kossler Dutton