Would prefer it to not be “hair” 'makeup" girlish oriented, but rather something challenging for her mind. I am her Uncle, and would like something maybe aimed at DIY outside of Lego if you know what I mean. Budget is small, maybe 39.99? Can move either way if needed
Advice, much needed as a 36 y/o male with no kids
My daughter around this age loves to draw, dance, dress, up in constumes (dinosaurs and what not). She is definitely interested in science and we have little lab kits and what not. I highly recommend Snap Circuits which should be in your budget. As with most things, important to do it with her at least once to help guide her and create that spark.
People underestimate kids. Whenever possible get them the real real of something, even if more limited. For instance my old man got her a real (cheap) cordless drill and a toolbox and she loved it. Kids know fake from real.
At this age interests come and go and it’s more about breadth / exposure / exploration.
6 is a perfect time to introduce them to a musical instrument. Or music genres themselves! Chess with uncle? Use this chance to both bond and expose her to one of your interests, with mentorship.
Get her Minecraft; set up Scratch programming for her.