Hello!
I am a working mom so while some the ideas are all mine - some are not my own - but my wonderful nanny's! She (Jenna) is always doing something different with my kids (5 and almost 2).
*Jenna makes a lot of "seek and find" games - where she will write numbers on pieces of paper, hide them around the house and then have them find the numbers in a certain order (or pick the number out of a bag and find the match). Or we did a HELLO KITTY scavenger hunt outside (but can be inside) where you make 10+ Hello Kitty's (just out of paper) and hide them all over the house (Maybe use different colors or letters - whatever you are working on with her to "check off" after she finds them (the blue one, the orange one, etc)
*Another project I love (that makes for great keepsakes for the baby books) is she will play a song and have my daughter, Nora, draw what the song makes her think of. Then Jenna will ask Nora what she's thinking and about the picture and then put the quote on the page. It's soooo cute and Nora loves to do it!
*We love to play hide the doll/car/whatever in the house and have them find it (saying hot or cold when they get close).
*Jenna also plays an animal noise game with them - asking them to sleep and then says "Wake up Loins" and then they act like lions, or monkeys, etc.
*Do you have the game ZINGO? That's a fun one and I think she could get it at 3yo.
*This is a new hit at our house. My daughter actually thought of it for her birthday party. You can go to Michaels and buy popsicle sticks and they also have little cut outs of people (or of course you could make those yourself). Staple the cut out to the stick and then decorate! Use paint, sparkles, googely (sp?) eyes, contruction paper, whatever! Then you use them to act out a PUPPET SHOW! It is a riot to see what the kids can come up with for a story.
*She's probably old enough for workbooks etc to work on letters, numbers etc. My daughter loved books like that (circle the matches, trace the letters,etc).
*My husband goes to Sprout.com to find craft ideas. They have some good ones there.
*Old games like Simon Says, Red Light Green Light and Hide and Seek, or bowling (if you have extra rolls of paper towels they work for bowling or stacking games!)
*My daughter is WAY into fashion design - loves to make dresses etc. You can use old sheets, or receiving blankets and make outfits for your dolls - or for her! We sometimes use tissue paper on her bed posts (again her idea) and then after she crafts the dresses I go in and "shop"!
*Also build a fort with pillow from the couch and have lunch inside! She will think you are the coolest!
You are a good mom for looking for new ideas for your little girl! Have a great time!
M.