Great! Thanks for doing these! The forms feel like they've been drawn with care and good control. But some things about the perspective is off: BOXES -In some of the boxes the lines are diverging instead of converging. If you need a refresher on how the perspective of a box works, check out the Structure Basics – Making Things Look 3D lesson, or this reply thread https://www.proko.com/s/3uw2 - The bottom left box is strong! Nice job! Some of the inner edges aren't converging toward the proper point. So pay extra attention to that. CYLINDERS The ellipses are off. Refer back to Structure Basics – Making Things Look 3D (at 07:05). I've also attached an image with some extra tips :) Do three more cylinders and three more boxes 😎 then tag me again. It could be useful to do drawings from reference as well. Maybe you can find a boxy and a cylindrical object at home, to draw from. You could also look at 3D-models you find online, but I would encourage drawing from life, if possible.