What are the best apps for 2year olds?

I'm a nanny and on Fridays the oldest has gym and that's when I let the 2year old play games on my phone. Playing games on electronics is a treat for them. What are some good apps?(iPhone)

Added (1). Age 2.

Added (2). She turned 2 in February. Ill find something. I don't want her to sit and just watch cartoons in it. Something to teach her and have fun while doing it.

Added (3). @something fishy. I rarely let them play on electronics. This is less then 30 min a week for her while her bro does gym. We do lots of activities - gym, park, story time, play sports, blocks, cars, puzzles, working on abc's, numbers, shapes, etc., go to indoor play places, go for walks, bike rides, Etc… So I don't think 20-30 min a week on an electronic is gonna hurt.

Bejeweled is the coolest game ever.

My daughter is nearly 3. With her old caretaker, who had an ipad, she used to play many app games. There are some that are puzzles, matching and jigsaw puzzles that she loved. My parents bought my daughter a nook tablet and I bought her many apps similar to it. Also being able to watch videos on youtube is cool. My daughter loves the "simple songs" videos and the "Gigglebellies". She watches these on her browser in the nook tablet and ipad. So I hope this helps.

None… Simply none no apps… No computer/phone

exercise with her… Right their.

go for a walk around the building

play hide and seek… Or peek a boo…

bring a memory game and play with just a few cards.better yet have her match them

kids that age need something better than… Entertainment technology,… Physical activity is a better choice

There's a ton of apps look up baby first and it has 1, 000s of free educational apps. Also there's a Mickey Mouse app called road rally and it follows a show but you have to talk, shake ect it's an Interacive app