When my DD was that age she started doing the jigsaw puzzles "upside down" after she did them a few times with the picture and could do it quickly...she seemed to think doing it by shape only and no picture was really entertaining. That gets a bit more life expectancy out of puzzles.
She also got lots of entertainment out of a bag of mixed dried beans (the kind you buy to make soup) and an emmpty egg carton...so many opportunities for sorting, etc. That was good at the kitchen table when I was preparing a meal and wanted her in sight.
Also an inexpensive little electronic piano goes a long way, as does Shoots and Ladders. We still play that and it's really funny when you get to that high number and slide back down.
If you don't have those classic wooden blocks with the letters on them you could get them, if she loves letters she might want to copy words out of books, my DD did that when she was your DD's age (they were a mirror image but otherwise accurate).
My DD (8) has "mean" parents, not alot of screen time and still no DS for her!
