SolidWorks

I created the pressure plate by using smart dimension and circle to create the cylinders and the hole in the middle of the pressure plate. Then I used filet to make the edges. After that I used circular pattern to repeat the cylinder I created around everything.

Box With Holes

I created this by centering the circles in the middle of the squares and then using extruded cut to make the holes go all the way through the square. I repeated this for each side and then filleted them by 2mm.

I created this by centering a circle in the middle of the rectangle I made then  I fileted the edges to make it look more realistic.

I created this by using extrude/boss/base and filleting the edge.

I created this by rotating the two previous parts into each other to assemble them.

This is my personal project where I made the character from geometry dash. I did this by making a square and then cutting the eyes and mouth out.