I Have Some Work To Do

Don't know where Lucas picked this phase up, but he sure knows how to use the context correctly.
When we is playing in the garden and I asked him to come in, he will say 'Lucas has some work to do.'
And recently, when I am working and he wanted to be near me, he will push a chair to be beside me and said 'Lucas has some work to do.'
And here are what are his work
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Drawing with his crayons.

Playing with the computer.