Monitor

Keyboard
1-Make a rectangle

2-Draw the keys

3- Use Push/Pull tool

4- Write the name of keys

How to make a house with spheres:
1-Make a square with spheres.
2-Make columns of the spheres.
3-Make a roof with the figure you prefer.
4-Add the details you want.

How to make a house in Sketch up
1-Make several circles (same area) forming a square

2-Use Push/Pull on all the circles

3-Make a roof

4-Add details