I get down and play with her and give her time to play by herself :) I am only home friday thru sunday as I work on monday thru thursday but these are some thing I do:
Read a peek a boo book with her, our duaghter loves when we have to open the flaps to see whats hidden.
You could turn on music while your on the floor with her, get her standing and hold her hands dancing.
Finger painting in high chair! Our daughter loves this! We just bought the non toxic crayola paint.
Also I put on mickey mouse clubhouse every now and then and she loves that show! And if i sit with her watching it, I answer questions aloud that mickey asks to help her learn.
I also spell her name, Ive been doing this since she was born, I will just look her in the eye and say Peyton, and then spell it and she stops everything to stare as I do this, she loves it!
Im not sure how you have her play area set up but we have a play area in our living room and one upstairs so I do morning playtime downstairs and afternoon playtime upstairs just to switch it up for her.
Also if she has alot of toys you may want to put some away and switch them out every couple of days, that may help keep her interested, like something new each time!
Also we have a storage cube that we keep some of her smalled toys and board books in, we keep this on her playmat, she spends while pulling it over and exploring whats inside. Then in the evening I put it all back in and she does it all over again in the morning lol!