Need this for road trips in a wireless version. Toddler headphones that limit volume and don't require constant readjusting.
Kidz Gear is a popular brand when it comes to kids headphones. Check out this list of their top products.
Kidz Gear Wired Headphones For Kids. I love these headphones because they actually fit very young children. It does a decent job of noise cancellation. The padded ear pieces are comfortable to wear. I also like the volume limiter feature as well.
Kidz Gear Wired Headphones For Kids by Kidz Gear, http://www.amazon.ca/dp/B0007NWL70/ref=cm_sw_r_pi_dp_C5VUqb0GBK486
I Travel for the Kids: 2012 Holiday Gift Guide: Kidz Gear Headphones