I also have a daughter (just a tad older) that has joined me in my workshop (I recently came back to the hobby)
Some ideas from stuff we have built:
- as mentioned, SnapTide Revell kits, cars mostly... but I also gave her couple "cool" looking planes (stealth fighter). you CAN use glue onthose if you wish, but my daugther only uses non-toxic glues (Elmers)
- the dino kits can be found in Ebay at very reasonable prices
- SciFi: star wars, etc etc
- Space - revell have some old but goodie kits, can be quite expensive though (relative)
- Revel re-released one of their old sailing ship that sort of "looks" like pirates of the carribean ship... my kid loved that one.
- People - I found couple old figure kits depicting some long lost knight or medieval warriors; pretty cheap used/old, who cares about fit..
Also, she "builds" other stuff besides kits, like simple wood puzzles, 3D wood structures (you can get these cheap, less than 5$, and the kid learns sanding parts for good fit ;)
Finally, I give her random parts of my kits to work on... like sanding an external fuel tank, or the figures which I never paint. I gave my kid her own "tool box" so she does not wanders into mine and takes an Xcto or something.
Hope this helps!