Reddit reviews Weather Guide 2019 Wall Calendar

Aim for something more interactive, like manual observations and books and guides explaining what can be observed in the sky, and less screen-looking and just reading arbitrary numbers from an automatic weather station.

The Weather Guide Calendar series is a favorite amongst a lot of meteorologists. It's informative and great eye candy. And it's a good Christmas gift every year - hint hint, wink wink.

Maybe look into volunteering for CoCoRaHS. She could actively partake in real weather measurements that are used in databases for studies and operations.

She could become an official storm spotter and send reports to your local Weather Service office.

An instruments kit would give her a hands-on way to actively partake in learning the science, rather than an electronic weather station from which she would just read numbers off a screen.

A Galileo thermometer, a glass water barometer, and/or a storm glass would be educational eye candy.

The American Meteorological Society has some great enthusiast books:

An Observer's Guide to Clouds and Weather

The AMS Weather Book: The Ultimate Guide to America's Weather

The best recommendation I've seen someone else have is to try to visit your (hopefully) local National Weather Service office.
Similarly, if you're near Colorado, the National Center for Atmospheric Research (NCAR) gives awesome tours. If you're on the East Coast, the National Hurricane Center, the Weather Prediction Center, and the Climate Prediction Center, I believe all give tours. If you're in the Midwest, the National Severe Storms Lab or the Storm Prediction Center are in Oklahoma and offer tours. If you live near a university and they have a meteorology program, professors are always eager to help young people get into weather, and they may be able to offer some local programs or activities in which to get involved.