Any 02 day good itinerary. we are with 02 kids for 02 days in beijing on 25th and 26th may.

Hi, here is my general suggestion:
D1, Tianmen Square, Forbidden City and Summer Palace. After that, you can go to the local famous Wangfujing Pedestrian to buy some souvenirs.
D2: Badaling Great Wall can be visitied in the morning. In the back journey, you can have a look at Bird nest (National Staduim) and Water Cube. In the afternoon, if there is time left, Temple of Heaven is recomended.

You will find more itineraries at this link:
https://www.travelchinaguide.com/package/beijing.htm
Also you will find the quotation. If you are interested in, send an email to travelchinaguide.com|tours with your requirements written.

I used their service once and remember that they pick me up around 09:00 in my hotel. Anyway, I believe it depends on you if you book a tour.