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
to add to the DIY section of your comment - air dry clay, a set of basic clay working tools, and a set of acrylic paints (+ varnish for the acrylics) could be very fun. cheap air dry clay is cheap (i’ve seen 1kg go for ~$3), a basic set of tools and paints also won’t break the bank, and it’s absolutely amazing fun!
even with 0 skill you can make nifty things - like minature foods (a blob? potato. cylinder? cucumber. ball? so many options here), simple figurines, animals, accessories for other things, candle holders - bascially, the only limit is your imagination.
though if you do think that’d be a good idea one word of warning - air dry clay is not food safe, any cups, plates, or dishes made with it can only ever be decorational. (the only clay you can eat off is the kind that you need to fire, glaze, and fire again at +900°C)