My dd loves toys, and loves playing with things she shouldn't! LOL
We got her an easel for Christmas (she was 16 months) and I kept going back and forth on it, but I had a coupon! She loves it. I don't think a day has gone by since that she hasn't used it for at least a couple minutes. It sits in our living room and has chalk for the chalkboard side and markers for the paper side. We got the Melissa and Doug one and it's adjustable. Most others I saw were a little to tall for her.
She also loves play doh. We have a little kitchen set for it, and her favorite thing is putting things on the plates, trays, and pans and cooking them in the oven. And to get to use plastic scissors, knives and a pizza cutter (or rotary cutter, since she wants to cut fabric like mom!) to "cut" the play doh.
She loves puzzles. She's moved on from the peg puzzles (one shape, one slot) to jigsaws and I much prefer the wooden ones that have a tray (and so does she). Melissa and Doug make 4 different 12 piece ones (pets, farm, vehicles and construction) and they sell them at Toys R Us even. We've found other 16 piece ones at zoos that she really likes, too.
She loves trains, we have some Brio and IKEA stuff, and are slowly accumulating more.
Her kitchen set. We just have a small ALEX brand stove/sink thing. She loves the Melissa and Doug cutting foods set. And their spice rack and sauces?. The spices are fun because the lids come off and there's something inside that makes a noise when you shake them.
She also has a wooden push cart, shopping cart and baby doll stroller that she loves pushing around the house with various items in.