- 7 to 8-power magnification
- Weatherproof and have a rainguard
- Help children set the barrels for the distance between their eyes.
- Choose an IPD range of 50mm to 55mm, providing a full field of view.
- Avoid a compact model. The smaller diameter focus dials on compact models make the binoculars actually focus "faster" making the image more challenging to refine. Also, small eye pieces can be titring to use over prolonged periods of time and small objective lenses might yield a smaller exit pupil diameter.
- Find a lower magnification with a larger field of view, 6 to 8-power. Viewing birds or other small (and often moving) wildlife through a binocular with a wide field of view is less challenging.
You can check out the Cornell Lab of Ornithology's article "The Age of Binoculars" for a more comprehensive review of binoculars for birders at http://www.birds.cornell.edu/Publications/LivingBird/Winter2005/Age_Binos.html.
Hopefully this helps you choose a binocular that will help your little one enjoy birding more. For now, my little birders will be using their inexpensive toy ones when they want to feel like a grown-up. They spot more with their eyes than I do with my binoculars anyway.