Bored with her toys,help!

My big girl isn't interested in hardly ANYTHING we have for her to play with. She lost interest months ago and I'm at a loss as I get her something new and she may use it for 2 weeks and be done with it. List of toys is gigantic. When people come to my house for the first time they literally ask me how many kids I watch in my daycare and are serious. We have a Lego table and hundreds of legos, horse to ride on,horse to brush with 17 inch doll,vtech learning table with all packets for learning,play dough and many kits, art supplies, Peel and stick background books, massive amount of books, 2 toy kitchens, a trampoline, ride on train with activities on it, large Christmas tree box of stuffed animals,a motorcycle to rock on, rocking chair her size and co8ch her size, baby dolls and nursery feeding sets,balls even some light up,Beatbo dancing dog,tea set,purses and play makeup, dress up stuff, drum with all music instrument set,blocks,tricycle,water table, minnie mouse electric car,chalk and bubbles outside, etc. Didnt even nearly touch the list of what we have and yet nothing seems to hold her interest. What are your kids enjoying and using or preferring to be doing? I'm at such a loss as to trying to get her to play and be excited again! Any suggestions help!