Personally, my kids have used the MSR Tyker snowshoe to great success (as much 'success' as one can achieve when you're a little person walking through the snow ;-). I found them to be the easiest snowshoe to get on and off, and they're made in the same style as the MSR Denali snowshoe, which has been a mainstay for winter adventurers for many years.
I'd like to connect you to @sarahbobera, who is also thinking about how to get her kiddo out on some winter adventures. She recently posted: How to help my kiddo become a winter tot? You two might be able to share some info and brainstorm ideas for getting those wiggles out this winter!
Hope this helps, thanks!
At REI, we believe a life outdoors is a life well lived.