Pet rocks went over incredibly well with my 2nd graders the 2 years I did it. Not sure how parents will respond to being the ones to have to do the clean up on that one. Slime making is always fun. Jewelry making is often a hit at girl scout overnights.
Not a craft but a 'PJ' party where you drop off microwave popcorn, watch a movie together might be fun. ... I'd make it well before bedtime personally. Not sure how you feel about this during covid but our library did a teddy bear sleepover .... you drop off your bear at the library and he spends the night. Pictures are taken, stories are read and the bears do all sorts of stuff kids might do at a sleep over. It was a huge hit. The next day the bears went home.
dd1 10/05
dd2 11/09
and 2 cocker spaniels